Which is the hottest month in Hanalei, Kauai?

The hottest time of year in Hanalei, Kauai is normally August. Expect maximum daytime temperatures to reach 29°C with high heat and humidity.

Which month has the most rain in Hanalei, Kauai?

In terms of rainfall, November is usually the wettest month in Hanalei, Kauai with 255mm on average. There are normally 18 days in November with some rain.

When is it sunniest in Hanalei, Kauai?

The sunniest time of year in Hanalei, Kauai is normally August with bright sunshine on average for 67% of daylight hours; that's 9 hours of sunshine per day.

When is the sea warmest in Hanalei, Kauai?

The sea is usually at its warmest in Hanalei, Kauai in September when the water temperature reaches 27°C.

Best time to visit Hanalei, Kauai

Q: When is the best time to visit Hanalei, Kauai?

The best time to visit Hanalei, Kauai is May, June and August based on the following average weather conditions. Maximum daytime temperature = 22 - 30°C. Daily hours of sunshine = 10 hours or more.

Find the best time to visit Hanalei, Kauai and plan your perfect trip in 2025/2026. Get holiday inspiration, weather guides, travel advice and find great deals.

Hanalei, Kauai by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Hawaii

Avalon Waterways: Top deals on 2026 river cruises

Sale

Book early & save on 2026 river cruises with Avalon Waterways
Filter deals by promotion, month, destination & more
Travel between 1st Jan & 31st Dec 2026 (inclusive)

Go to Avalon Waterways deal >>

Expires at 23:59 on Thursday 31st Dec 2026 · View all Avalon Waterways offers

When is the best time to visit Hanalei, Kauai?

The best time to visit Hanalei, Kauai is May, June and August based on the following average weather conditions.

Maximum daytime temperature = 22 - 30°C [remove]
Daily hours of sunshine = 10 hours or more [remove]

Change the criteria to reflect your weather preferences.

4
Jan
4
Feb
4
Mar
4
Apr
4
May
4
Jun
4
Jul
4
Aug
4
Sep
4
Oct
4
Nov
3.5
Dec

Change criteria

Max Day Temperature (°C)

25
Jan
25
Feb
25
Mar
26
Apr
27
May
28
Jun
29
Jul
29
Aug
29
Sep
28
Oct
27
Nov
26
Dec

Hours of Sunshine (daily)

6
Jan
7
Feb
7
Mar
7
Apr
8
May
8
Jun
8
Jul
9
Aug
8
Sep
7
Oct
6
Nov
5
Dec

Best time to visit

Destination

Daytime temperature

Sunshine hours

Sea temperature

Monthly rainfall

Days with some rain

Heat & humidity

The weather guide for Hawaii (Hanalei, Kauai) shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by meteoblue. Find out more about our data sources.

Metric (°C / mm) | Imperial (°F / inches)