Kauai in August
August in Kauai brings highs around 85°F (30°C), lows near 75°F and about 18 rainy days. The sun sets around 7:10 pm. The sea is about 80°F (26°C). It's off season for sightseeing: wet and quieter.
Photo: Jim Bahn, CC BY 2.0
What August is good for in Kauai
Each activity rated for August's weather and sea.
August next to July and September
| Month | July | August | September |
|---|---|---|---|
| High | 85°F (29°C) | 85°F (30°C) | 85°F (30°C) |
| Low | 75°F (24°C) | 75°F (24°C) | 75°F (24°C) |
| Rainy days | 19 | 18 | 16 |
| Sea | 79°F | 80°F | 80°F |
| Sunset | 7:25 pm | 7:10 pm | 6:42 pm |
| Daylight | 13 h 22 min | 12 h 54 min | 12 h 17 min |
Averages for Lihue Airport, Hawaii, 1991–2020; sunrise and sunset on the 15th. Kauai water temperature by month.
Tours in Kauai
Kauai: NaPali Boat Tour on the Amelia KFrom $227View 
Kauai Chocolate Farm Tasting TourFrom $145View 
Kauai: Waimea Town, Wailua River Cruise & Fern Grotto TourFrom $279View
Tours from Viator. Good Outing may earn a commission when you book, at no cost to you.
Questions
Is August a good time to visit Kauai?
It's off season for sightseeing: wet and quieter. The most comfortable months overall are January and February.
How hot is Kauai in August?
Average highs are about 85°F (30°C) and lows about 75°F (24°C).
Does it rain much in Kauai in August?
August averages 18 rainy days, against 19 in the wettest month.
How warm is the sea in Kauai in August?
About 80°F (26°C). Warm enough for long swims and snorkeling.
