✓ Updated August 2026
Weather data and travel information verified current
Best Time to Visit Big Island, Hawaii, USA: Sep or Oct 2026
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Discover tours, activities, and experiences in Big Island, Hawaii, USA
Quick Answer:
The spring months of April through June offer a truly special time to explore Hawaii's Big Island, with warm, sunny days perfect for witnessing the breathtaking volcanic landscapes and vibrant coral reefs. Imagine the gentle morning mist rising over Mauna Kea as you start your day, followed by afternoons basking on black sand beaches. The summer months (July-August) are also wonderful, though slightly warmer, ideal for diving and snorkeling with manta rays, while the winter months (December-February) bring cooler breezes and the chance to spot humpback whales, creating a dramatic, awe-inspiring backdrop.
Best Months to Visit:
Airport Code
KOA
Coordinates
37.53°, -79.36°
Climate Overview
The Big Island of Hawaii whispers a year-round invitation, with its climate a vibrant tapestry woven from trade winds and volcanic warmth. Imagine gentle, warm breezes caressing your skin in the spring and summer, carrying the sweet scent of blooming plumeria and hibiscus, perfect for exploring lush rainforests and sun-drenched beaches. As autumn arrives, the air might carry a hint of moisture, bringing brief, refreshing showers that invigorate the island's verdant landscapes and often signal the start of whale watching season. Winter, while still mild and pleasant, can bring more dramatic ocean swells to the north and west shores, creating a spectacular show for surfers and observers alike, while the higher elevations might even dust themselves with a rare, cool mist, offering a stark contrast to the tropical warmth below.
Best months at a glance: Sep, Oct
Jump to the month-by-month guide →Take this guide with you — download it as a free PDF
Weather, best months, things to do, and travel tips
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Top Things to Do
Stargazing at Mauna Kea Summit
Ascend to the summit of Mauna Kea, one of the world's premier stargazing locations, for an unparalleled celestial show. The thin, dry air above the clouds offers crystal-clear views of the cosmos; visit the Visitor Information Station for free stargazing programs (check their schedule as it varies) or book a guided tour for a deeper understanding of the constellations.
Sunrise Kayak in Kealakekua Bay
Paddle into the tranquil waters of Kealakekua Bay, a marine life conservation district, for a chance to witness spinner dolphins in their natural habitat. The early morning offers calm waters and fewer boats, making it ideal for spotting these playful creatures and exploring the vibrant coral reefs below.
Exploring the Painted Church of St. Benedict
Step inside the historic St. Benedict Roman Catholic Church in Captain Cook, a hidden gem adorned with vibrant, hand-painted murals that mimic the architecture of European cathedrals. This unexpected artistic marvel offers a peaceful and culturally rich experience, transporting you to another time and place.
Hiking Through Thurston Lava Tube (Nahuku)
Venture into the heart of Hawaii Volcanoes National Park and walk through Thurston Lava Tube, a massive, ancient lava tube formed by molten rock. The cool, damp air inside, illuminated by soft lighting, creates an otherworldly atmosphere as you imagine the fiery river that once flowed here.
💡 Travel Tip: For the best value on hotels during this season, check current rates on Trip.com.
Essential Travel Tips
Rent a 4WD vehicle, especially if you plan to explore beyond the main paved roads. While not strictly necessary for resort areas, it's essential for accessing places like the Mauna Kea summit (for stargazing!) or certain black sand beaches, and will give you peace of mind on Hawaii's sometimes rougher terrain.
Pack reef-safe sunscreen and buy it *before* you arrive. Many local shops and hotels sell it, but you'll pay a premium. Using sunscreen that doesn't harm coral is mandated by law in Hawaii, so make sure yours is labeled 'reef-safe' or 'mineral-based' to protect the beautiful marine life.
Embrace the 'island time' mentality and be patient. Things move at a slower pace here, and that includes service. Don't get frustrated if your food takes a little longer or if a shop closes a bit early; it's part of the relaxed vibe. A simple 'Aloha' and 'Mahalo' go a long way.
Don't miss out on local plate lunches and poke bowls! For an authentic and affordable experience, seek out local spots like Da Poke Shack in Kona or Tex Drive In in Honokaa for their famous malasadas. These are often found in unassuming buildings, so don't judge a book by its cover.
Be aware of ocean conditions and heed all warning signs. The currents and waves on the Big Island can be powerful and unpredictable, especially on the north and west shores. Always check the surf report and never turn your back on the ocean; admire its beauty from a safe distance if conditions look rough.
Pack layers, as the weather varies dramatically by elevation and side of the island. You'll need light clothing for the sunny coasts, but a jacket or sweater is essential for visiting the cooler, higher elevations like Volcanoes National Park or Mauna Kea. Waterproof gear is also a good idea, especially for the lush, rainy Hilo side.
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Find Your Best Month to Visit Big Island
Pick what matters most to you and we'll rank every month of the year using Big Island's actual weather data.
- #1SepBest match🌡️ 80°F high🌧️ 9 rainy days🌅 12.4h daylight
- #2Oct🌡️ 69°F high🌧️ 8 rainy days🌅 11.2h daylight
- #3Nov🌡️ 57°F high🌧️ 7 rainy days🌅 10.2h daylight
- #4Jul🌡️ 89°F high🌧️ 11 rainy days🌅 14.4h daylight
- #5Aug🌡️ 85°F high🌧️ 11 rainy days🌅 13.6h daylight
- #6Jun🌡️ 84°F high🌧️ 11 rainy days🌅 14.7h daylight
- #7Apr🌡️ 68°F high🌧️ 10 rainy days🌅 13.2h daylight
- #8Dec🌡️ 50°F high🌧️ 9 rainy days🌅 9.6h daylight
- #9May🌡️ 76°F high🌧️ 12 rainy days🌅 14.2h daylight
- #10Mar🌡️ 58°F high🌧️ 10 rainy days🌅 12h daylight
- #11Jan🌡️ 45°F high🌧️ 9 rainy days🌅 9.9h daylight
- #12Feb🌡️ 50°F high🌧️ 10 rainy days🌅 10.8h daylight
Weather Details
Monthly Weather Data Table
| Month | High (°C) | Low (°C) | High (°F) | Low (°F) | Rainfall (mm) | Rain Days | Daylight (h) |
|---|---|---|---|---|---|---|---|
| Jan | 7°C | -2°C | 45°F | 29°F | 85mm | 9 days | 9.9h |
| Feb | 10°C | 0°C | 50°F | 31°F | 94mm | 10 days | 10.8h |
| Mar | 14°C | 3°C | 58°F | 38°F | 89mm | 10 days | 12.0h |
| Apr | 20°C | 8°C | 68°F | 47°F | 104mm | 10 days | 13.2h |
| May | 24°C | 14°C | 76°F | 57°F | 104mm | 12 days | 14.2h |
| Jun | 29°C | 18°C | 84°F | 64°F | 80mm | 11 days | 14.7h |
| Jul | 32°C | 21°C | 89°F | 69°F | 73mm | 11 days | 14.4h |
| Aug | 30°C | 20°C | 85°F | 67°F | 87mm | 11 days | 13.6h |
| Sep | 27°C | 17°C | 80°F | 62°F | 98mm | 9 days | 12.4h |
| Oct | 21°C | 10°C | 69°F | 51°F | 91mm | 8 days | 11.2h |
| Nov | 14°C | 4°C | 57°F | 39°F | 79mm | 7 days | 10.2h |
| Dec | 10°C | 1°C | 50°F | 34°F | 102mm | 9 days | 9.6h |
Big Island, Hawaii, USA Month by Month: Complete Guide
Planning your trip to Big Island, Hawaii, USA? Here's what to expect each month:
Jan in Big Island, Hawaii, USA
Weather
7°C°C / 45°F°F
9 days rainy days • 85mmmm
What to Expect
Cold, with highs around 7°C. Warm clothing and layers are essential. Occasional showers are likely, so a light rain jacket is handy. It's the coolest month of the year here.
Crowd Level
🟢 Low - Quiet season, easy to find accommodation
Feb in Big Island, Hawaii, USA
Weather
10°C°C / 50°F°F
10 days rainy days • 94mmmm
What to Expect
Cool, with highs near 10°C. Pack layers and a light jacket for daytime comfort. Occasional showers are likely, so a light rain jacket is handy. Highs run about 22°C below Jul, the year's warmest month.
Crowd Level
🟢 Low - Quiet season, easy to find accommodation
Mar in Big Island, Hawaii, USA
Weather
14°C°C / 58°F°F
10 days rainy days • 89mmmm
What to Expect
Cool, with highs near 14°C. Pack layers and a light jacket for daytime comfort. Occasional showers are likely, so a light rain jacket is handy. Highs run about 18°C below Jul, the year's warmest month.
Crowd Level
🟢 Low - Quiet season, easy to find accommodation
Apr in Big Island, Hawaii, USA
Weather
20°C°C / 68°F°F
10 days rainy days • 104mmmm
What to Expect
Mild and comfortable, around 20°C. Pleasant conditions for sightseeing and walking. Occasional showers are likely, so a light rain jacket is handy. Highs run about 12°C below Jul, the year's warmest month. It also brings the most rain of any month here.
Crowd Level
🟡 Moderate - Comfortable crowds, good availability
May in Big Island, Hawaii, USA
Weather
24°C°C / 76°F°F
12 days rainy days • 104mmmm
What to Expect
Mild and comfortable, around 24°C. Pleasant conditions for sightseeing and walking. Occasional showers are likely, so a light rain jacket is handy. Highs run about 8°C below Jul, the year's warmest month. It also brings the most rain of any month here.
Crowd Level
🟡 Moderate - Comfortable crowds, good availability
Jun in Big Island, Hawaii, USA
Weather
29°C°C / 84°F°F
11 days rainy days • 80mmmm
What to Expect
Warm and summery, with highs near 29°C — great for beaches and outdoor activities. Occasional showers are likely, so a light rain jacket is handy. Highs run about 3°C below Jul, the year's warmest month.
Crowd Level
🔴 High - Peak tourist season, book early
Jul in Big Island, Hawaii, USA
Weather
32°C°C / 89°F°F
11 days rainy days • 73mmmm
What to Expect
Hot, with daytime highs around 32°C. Plan indoor breaks during midday and stay hydrated. Occasional showers are likely, so a light rain jacket is handy. It's the warmest month of the year here. It's the driest month of the year here.
Crowd Level
🔴 High - Peak tourist season, book early
Aug in Big Island, Hawaii, USA
Weather
30°C°C / 85°F°F
11 days rainy days • 87mmmm
What to Expect
Warm and summery, with highs near 30°C — great for beaches and outdoor activities. Occasional showers are likely, so a light rain jacket is handy. Highs run about 2°C below Jul, the year's warmest month.
Crowd Level
🔴 High - Peak tourist season, book early
Sep in Big Island, Hawaii, USA
⭐ Best TimeWeather
27°C°C / 80°F°F
9 days rainy days • 98mmmm
What to Expect
Warm and summery, with highs near 27°C — great for beaches and outdoor activities. Occasional showers are likely, so a light rain jacket is handy. Highs run about 5°C below Jul, the year's warmest month.
Crowd Level
🟡 Moderate - Comfortable crowds, good availability
Oct in Big Island, Hawaii, USA
⭐ Best TimeWeather
21°C°C / 69°F°F
8 days rainy days • 91mmmm
What to Expect
Mild and comfortable, around 21°C. Pleasant conditions for sightseeing and walking. Occasional showers are likely, so a light rain jacket is handy. Highs run about 11°C below Jul, the year's warmest month.
Crowd Level
🟡 Moderate - Comfortable crowds, good availability
Nov in Big Island, Hawaii, USA
Weather
14°C°C / 57°F°F
7 days rainy days • 79mmmm
What to Expect
Cool, with highs near 14°C. Pack layers and a light jacket for daytime comfort. Occasional showers are likely, so a light rain jacket is handy. Highs run about 18°C below Jul, the year's warmest month.
Crowd Level
🟢 Low - Quiet season, easy to find accommodation
Dec in Big Island, Hawaii, USA
Weather
10°C°C / 50°F°F
9 days rainy days • 102mmmm
What to Expect
Cool, with highs near 10°C. Pack layers and a light jacket for daytime comfort. Occasional showers are likely, so a light rain jacket is handy. Highs run about 22°C below Jul, the year's warmest month.
Crowd Level
🔴 High - Peak tourist season, book early
All Things to Do in Big Island, Hawaii, USA
Stargazing at Mauna Kea Summit
attractionAscend to the summit of Mauna Kea, one of the world's premier stargazing locations, for an unparalleled celestial show. The thin, dry air above the clouds offers crystal-clear views of the cosmos; visit the Visitor Information Station for free stargazing programs (check their schedule as it varies) or book a guided tour for a deeper understanding of the constellations.
Best time: All year, but clearer skies often in winter months (Nov-Feb)
Sunrise Kayak in Kealakekua Bay
activityPaddle into the tranquil waters of Kealakekua Bay, a marine life conservation district, for a chance to witness spinner dolphins in their natural habitat. The early morning offers calm waters and fewer boats, making it ideal for spotting these playful creatures and exploring the vibrant coral reefs below.
Exploring the Painted Church of St. Benedict
culturalStep inside the historic St. Benedict Roman Catholic Church in Captain Cook, a hidden gem adorned with vibrant, hand-painted murals that mimic the architecture of European cathedrals. This unexpected artistic marvel offers a peaceful and culturally rich experience, transporting you to another time and place.
Hiking Through Thurston Lava Tube (Nahuku)
natureVenture into the heart of Hawaii Volcanoes National Park and walk through Thurston Lava Tube, a massive, ancient lava tube formed by molten rock. The cool, damp air inside, illuminated by soft lighting, creates an otherworldly atmosphere as you imagine the fiery river that once flowed here.
Local Plate Lunch Crawl in Hilo
foodEmbark on a culinary adventure through Hilo, sampling authentic Hawaiian plate lunches from local eateries like Ponds Hilo or Ken's House of Pancakes. These hearty meals, typically featuring rice, macaroni salad, and a choice of protein like kalua pig or teriyaki chicken, offer a delicious and affordable taste of island life.
Black Sand Beach Serenity at Punalu'u
natureRelax on the striking black sand of Punalu'u Beach, a unique volcanic shoreline where Hawaiian green sea turtles (honu) often bask in the sun. Visit in the late afternoon for softer light and a higher chance of seeing these majestic creatures up close, but remember to admire them from a respectful distance.
Best time: All year, but turtles are more frequently seen during warmer months
Kona Coffee Farm Tour and Tasting
activityDiscover the rich history and meticulous process behind world-renowned Kona coffee with a visit to a local farm. Many farms offer complimentary tours and tastings, allowing you to savor the distinct flavors of the beans while learning about the volcanic soil and ideal microclimate that contribute to their exceptional quality.
Exploring the Waipio Valley Lookout
attractionGaze upon the breathtaking, sacred Waipio Valley from the scenic overlook, a place of immense cultural significance to Native Hawaiians. While access into the valley is restricted, the panoramic views of dramatic cliffs, waterfalls, and the wild coastline are a powerful reminder of the island's raw beauty and history.
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Getting Around Big Island, Hawaii, USA
Rental Car
The undisputed king of Big Island transportation, a rental car is essential for exploring its vast and diverse landscapes, from volcanic parks to remote beaches. You'll need it to cover the significant distances between Kona and Hilo, and to reach trailheads and viewpoints.
Ride-Sharing Services (Uber/Lyft)
Available primarily in the more populated areas of Kona and Hilo, ride-sharing can be a convenient option for short trips or getting to/from the airport if you don't want to rent a car for your entire stay. Availability can be limited outside these hubs.
Island Shuttle Services
Several companies offer shuttle services connecting major towns and attractions, particularly between Kona and Hilo, and to popular tourist destinations like Volcanoes National Park. This is a good option if you prefer not to drive or want to relax and enjoy the scenery.
Taxis
Taxis are available at airports and in larger towns like Kona and Hilo, but they are generally more expensive than ride-sharing services and less practical for extensive exploration due to the island's size.
Inter-Island Flights
While not for getting around the Big Island itself, inter-island flights are crucial if you're visiting multiple Hawaiian islands. Hawaiian Airlines and Southwest offer frequent flights between Honolulu (Oahu), Kahului (Maui), Lihue (Kauai), and Kona/Hilo (Big Island).
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Frequently Asked Questions
When's the absolute best time to visit the Big Island to catch the humpback whales and avoid the biggest crowds?
For a magical whale-watching experience, aim for January through March. This is peak humpback season, and you'll have fantastic chances to spot them from shore or on a boat tour. To dodge the largest crowds, try to visit in mid-January or early March, as the holiday rush will have subsided, but the whales are still very active.
Beyond the famous Volcanoes National Park, what's a truly unique natural wonder on the Big Island that most tourists miss?
You absolutely must explore the Waipio Valley Lookout and, if you're adventurous and conditions permit, hike down into the valley itself. It's a sacred place, a lush, ancient Hawaiian ahupua'a (land division) with dramatic cliffs, waterfalls, and taro fields. Remember to be respectful of the land and the local residents who call it home; it's not just a scenic viewpoint, but a living cultural site.
Is it really necessary to rent a 4WD vehicle on the Big Island, or can I get by with a standard car?
While you can certainly see a lot with a standard car, a 4WD opens up so many more possibilities, especially if you want to explore places like Pololu Valley or get closer to some of the more remote beaches. If you're planning on driving up to Mauna Kea's summit (for stargazing, not the visitor center), a 4WD is mandatory. For most coastal drives and the main attractions, a regular car is fine, but for true exploration, I'd splurge on the 4WD.
What's a local etiquette tip I should know before visiting sacred sites or interacting with Hawaiian culture?
Always ask permission before taking photos of people, especially elders, and be mindful when visiting heiau (ancient temples) or other sacred sites. It's customary to leave a small offering, like a lei or a ti leaf, as a sign of respect. Never remove rocks or sand from these areas; the 'ehu kai (sea spray) is said to carry the spirit of Pele, and taking these elements is considered disrespectful.
I'm planning to drive from Kona to Hilo. What's the best route and are there any must-stop spots along the way?
The most scenic route is Highway 19, also known as the Hamakua Coast. It's a longer drive, but incredibly rewarding with lush rainforests, stunning coastal views, and charming small towns. Make sure to stop at the Waipio Valley Lookout, Akaka Falls State Park for its majestic waterfall, and perhaps grab some delicious local coffee in a town like Honoka'a. It's a journey, not just a drive!
What's the deal with the different weather on opposite sides of the island? How do I pack for it?
The Big Island is famous for its microclimates! The Kona side is generally sunny and dry, perfect for beach days, while the Hilo side is lush, tropical, and receives significantly more rainfall. If you're visiting Volcanoes National Park, expect cooler temperatures and potentially rain, even if it's sunny elsewhere. Pack layers – light clothing for the coast, a rain jacket, and a warmer sweater or jacket for higher elevations like Volcano or Mauna Kea.
Is Big Island, Hawaii, USA expensive to visit?
Costs in Big Island, Hawaii, USA vary a lot with your travel style and when you go, with prices generally peaking around Sep. Booking accommodation and activities ahead, travelling outside the busiest months, and comparing prices across booking sites are the most reliable ways to keep your trip affordable.
What is Big Island, Hawaii, USA famous for?
Big Island, Hawaii, USA is famous for Hiking Through Thurston Lava Tube (Nahuku), Black Sand Beach Serenity at Punalu'u, and Exploring the Painted Church of St. Benedict. Venture into the heart of Hawaii Volcanoes National Park and walk through Thurston Lava Tube, a massive, ancient lava tube formed by molten rock. The cool, damp air inside, illuminated by soft lighting, creates an otherworldly atmosphere as you imagine the fiery river that once flowed here. The best time to experience it all is during Sep or Oct.
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