Kauai in May
May in Kauai brings highs around 82°F (28°C), lows near 71°F and about 14 rainy days. The sun sets around 7:10 pm. The sea is about 77°F (25°C). It's a fair month: plan indoor backups.
Photo: Jim Bahn, CC BY 2.0
What May is good for in Kauai
Each activity rated for May's weather and sea.
May next to April and June
| Month | April | May | June |
|---|---|---|---|
| High | 80°F (27°C) | 82°F (28°C) | 83°F (29°C) |
| Low | 69°F (21°C) | 71°F (22°C) | 73°F (23°C) |
| Rainy days | 16 | 14 | 18 |
| Sea | 76°F | 77°F | 78°F |
| Sunset | 6:58 pm | 7:10 pm | 7:23 pm |
| Daylight | 12 h 40 min | 13 h 11 min | 13 h 29 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 May a good time to visit Kauai?
It's a fair month: plan indoor backups. The most comfortable months overall are January and February.
How hot is Kauai in May?
Average highs are about 82°F (28°C) and lows about 71°F (22°C).
Does it rain much in Kauai in May?
May averages 14 rainy days, against 19 in the wettest month.
How warm is the sea in Kauai in May?
About 77°F (25°C). Warm enough for long swims and snorkeling.
