January in Kauai: strong conditions, 11th of 12
Good · 8.2/10January averages 24°C (74°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Rainfall runs 56 mm, so plan one flexible day in three; you still get about 15 days with 6+ hours of sunshine and 10.8 hours of daylight.
It scores 8.2/10 here, 11th of 12 months, against 9.8/10 in the destination's best month.
Figure on mid-season pricing, with crowds are light for this destination.
Pack light clothing, swimwear and real sun protection, a packable rain layer.
Flexible dates? June scores 1.6 points higher here — enough to change the trip.
February is one of the strongest months in Kauai (10th)
Best window · 8.5/10February averages 23°C (74°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Rainfall runs 70 mm, so plan one flexible day in three; you still get about 19 days with 6+ hours of sunshine and 11.2 hours of daylight.
A 8.5/10 puts this among the year's best months in Kauai (10th of 12); only June scores higher, at 9.8/10.
Figure on low-season pricing, with crowds are light for this destination.
Pack light clothing, swimwear and real sun protection, a packable rain layer.
March in Kauai — one of the year's strongest windows (8th)
Best window · 9.2/10With 24°C (74°F) on average, March delivers classic beach weather: plenty of time in the water, with beach and boat plans rarely disrupted by cold.
Budget for roughly 59 mm of rain this month — a flexible day or two helps — with about 27 days with 6+ hours of sunshine and 11.8 hours of daylight to work around it.
On our climate-comfort scale this is one of the strongest months of the year for Kauai at 9.2/10 (8th of 12), just behind June at 9.8/10.
Expect mid-season pricing, and crowds are moderate.
Pack light clothing, swimwear and real sun protection, a packable rain layer.
April is one of the strongest months in Kauai (6th)
Best window · 9.5/10April averages 24°C (75°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Expect 44 mm of rain — occasional showers rather than washed-out days — alongside about 28 days with 6+ hours of sunshine and 12.5 daylight hours.
A 9.5/10 puts this among the year's best months in Kauai (6th of 12); only June scores higher, at 9.8/10.
Plan for mid-season pricing, with crowds are moderate.
Pack light clothing, swimwear and real sun protection.
May ranks 7th of 12 for Kauai — one of the best windows
Best window · 9.4/10With 25°C (76°F) on average, May delivers classic beach weather: plenty of time in the water, with beach and boat plans rarely disrupted by cold.
Budget for roughly 48 mm of rain this month — a flexible day or two helps — with about 31 days with 6+ hours of sunshine and 13.1 hours of daylight to work around it.
On our climate-comfort scale this is one of the strongest months of the year for Kauai at 9.4/10 (7th of 12), just behind June at 9.8/10.
Budget for mid-season pricing, and crowds are moderate.
Pack light clothing, swimwear and real sun protection, a packable rain layer.
June in Kauai — the year's strongest window
Best window · 9.8/10June averages 25°C (78°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Rain is a non-issue at 13 mm for the month, with about 30 days with 6+ hours of sunshine and 13.3 hours of daylight to work with.
On our climate-comfort scale this is the top-ranked month of the year for Kauai at 9.8/10 — the reference point every other month on this page is measured against.
Plan for peak pricing, with crowds are moderate. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack light clothing, swimwear and real sun protection.
July ranks 2nd of 12 for Kauai — one of the best windows
Best window · 9.8/10July averages 26°C (78°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Expect 15 mm of rain — occasional showers rather than washed-out days — alongside about 31 days with 6+ hours of sunshine and 13.2 daylight hours.
A 9.8/10 puts this among the year's best months in Kauai (2nd of 12); only June scores higher, at 9.8/10.
Figure on peak pricing, with this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack light clothing, swimwear and real sun protection.
August is one of the strongest months in Kauai (3rd)
Best window · 9.8/10Days in August average 27°C (80°F) and humidity near 75% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
With around 17 mm of rain, any showers tend to pass through rather than settle in; about 31 days with 6+ hours of sunshine and 12.8 hours of daylight fill the rest.
On our climate-comfort scale this is one of the strongest months of the year for Kauai at 9.8/10 (3rd of 12), just behind June at 9.8/10.
Budget for peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.
September ranks 4th of 12 for Kauai — one of the best windows
Best window · 9.8/10Days in September average 27°C (80°F) and humidity near 75% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
With around 19 mm of rain, any showers tend to pass through rather than settle in; about 30 days with 6+ hours of sunshine and 12.1 hours of daylight fill the rest.
On our climate-comfort scale this is one of the strongest months of the year for Kauai at 9.8/10 (4th of 12), just behind June at 9.8/10.
Expect peak pricing, and crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.
October ranks 5th of 12 for Kauai — one of the best windows
Best window · 9.7/10October averages 26°C (80°F) and humidity near 75%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Expect 29 mm of rain — occasional showers rather than washed-out days — alongside about 23 days with 6+ hours of sunshine and 11.5 daylight hours.
A 9.7/10 puts this among the year's best months in Kauai (5th of 12); only June scores higher, at 9.8/10.
Plan for peak pricing, with crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.
November is one of the strongest months in Kauai (9th)
Best window · 8.7/10November averages 25°C (78°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Expect 37 mm of rain — occasional showers rather than washed-out days — alongside about 16 days with 6+ hours of sunshine and 10.9 daylight hours.
A 8.7/10 puts this among the year's best months in Kauai (9th of 12); only June scores higher, at 9.8/10.
Figure on mid-season pricing, with crowds are moderate.
Pack light clothing, swimwear and real sun protection.
December holds up well in Kauai — 12th best month
Good · 7.9/10With 24°C (76°F) on average, December delivers classic beach weather: plenty of time in the water, with beach and boat plans rarely disrupted by cold.
Budget for roughly 58 mm of rain this month — a flexible day or two helps — with about 13 days with 6+ hours of sunshine and 10.7 hours of daylight to work around it.
That is 7.9/10 on the same scale — 12th of 12 months, versus 9.8/10 for the best month here.
Expect low-season pricing, and crowds are light for this destination.
Pack light clothing, swimwear and real sun protection, a packable rain layer.
If your dates are flexible, June is materially better in Kauai — 1.9 points higher on the same scale.