Beach
Lumahai Beach
Kauai County, United States · sea 26.7 °C at its warmest, in September

Sea temperature month by month
Monthly means in °C, NOAA OISST v2.1 climatology 1991–2020, sampled 20 km offshore, at the nearest open water cell of a 0.25° grid.
About
Lumahaʻi Beach is a beach on the north shore of Kauai, Hawaii. Situated at the mouth of Lumahaʻi River, is accessed along Hawaii Route 560 near Wainiha, between Hanalei and Haʻena State…
Questions
How warm is the sea at Lumahai Beach?
The sea off Lumahai Beach averages 26.7 °C at its warmest, in September, and 23.5 °C at its coolest. These are monthly means from NOAA's OISST v2.1 satellite and buoy record for 1991 to 2020, sampled at the beach's own coordinates.
When can you swim at Lumahai Beach?
The sea reaches 20 °C or more from All year. Twenty degrees is where most swimmers stop calling water cold; below it, a wetsuit helps.
Where is Lumahai Beach?
Lumahai Beach is on the coast of Kauai County, United States, at 22.2152, -159.5265. The map on this site flies straight to it.
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