Hawaii, United States
North Pacific Ocean22.22°N, 159.53°WStation UN-HAW-LUM

Lumahaʻi Beach Sea Water Temperature

A tropical beach on the North Pacific Ocean, warmest around September at about 27.1°C. Today's reading, 7-day forecast, and monthly averages below.

Live readings · auto-updating
Water Temperature NowBuoy & Sentinel-3 SST

Lumahaʻi Beach water temperature

27.1
80.8°FWarm & Ideal (24°C – 28°C)

Ideal swimming conditions. Feels soothing and warm, perfect for hours in the water without getting cold.

+0°vs Sep avgNorth Pacific Ocean22.22°N, 159.53°W
Activity Index:SwimmingSnorkelingSurfingTypical conditions
Marine Atmosphere Grid Live Marine Feed
Coastal Air
29°C
83.5°F onshore
Wind Speed
12 km/h
Surface wind
Wave Height
0.8 m
Slight shore chop
Swell
0.6 m
Deep water swell
Wave Period
6 s
Peak interval
UV Index
—
Daily maximum
Sunrise
—
First morning light
Sunset
—
Golden hour close

7-Day Water Temperature Forecast

Open-Meteo ocean model
Today
WedSep 30
27.1°C
80.8°F
Waves: 1m
Warm
ThuOct 1
27.4°C
81.3°F
Waves: 0.9m
Warm
FriOct 2
27.5°C
81.5°F
Waves: 0.7m
Warm
SatOct 3
27.4°C
81.3°F
Waves: 0.6m
Warm
SunOct 4
27.1°C
80.8°F
Waves: 0.7m
Warm
MonOct 5
26.8°C
80.2°F
Waves: 0.9m
Warm
TueOct 6
26.7°C
80.1°F
Waves: 1m
Warm
Forecast cooling trend: -0.4°C over 7 days at Lumahaʻi Beach.
Confidence: High

Lumahaʻi Beach Monthly Water Temperature Averages

Historical monthly climatology. The warmest water in Lumahaʻi Beach occurs inJanuary, February, April, May, June, July, August, September, October, November, December — peaking at27.1°C (80.8°F) in September.

Year-Round Water Temperature Curve (°C / °F)

Hover a bar for details
Current month Comfortable (20–24°C) Warm (24°C+) Cool (<20°C)
25
Jan
24
Feb
24
Mar
25
Apr
25
May
26
Jun
26
Jul
27
Aug
Current
27
Sep
27
Oct
26
Nov
25
Dec
Full 12-month data table — min / avg / max & swimming comfort
MonthMin Water TempAverage Water TempMax Water TempSwimming Comfort
January23.3°C24.5°C26°CWarm & Ideal (24°C – 28°C)
February23.1°C24.1°C25.3°CWarm & Ideal (24°C – 28°C)
March22.7°C23.9°C25.2°CComfortable (20°C – 24°C)
April23.1°C24.5°C25.4°CWarm & Ideal (24°C – 28°C)
May24.6°C25.4°C27.2°CWarm & Ideal (24°C – 28°C)
June24.7°C26°C26.9°CWarm & Ideal (24°C – 28°C)
July24.8°C26.3°C27.5°CWarm & Ideal (24°C – 28°C)
August25.3°C26.7°C28.5°CWarm & Ideal (24°C – 28°C)
SeptemberCurrent25.7°C27.1°C28.8°CWarm & Ideal (24°C – 28°C)
October25.4°C26.7°C28.4°CWarm & Ideal (24°C – 28°C)
November24.5°C26.1°C27.9°CWarm & Ideal (24°C – 28°C)
December23.8°C25.3°C27°CWarm & Ideal (24°C – 28°C)

Swimming FAQs for Lumahaʻi Beach

Is the sea warm enough to swim in Lumahaʻi Beach today?

Typical sea surface temperature in Lumahaʻi Beach this time of year is 27.1°C (80.8°F) — classified as Warm & Ideal (24°C – 28°C). Ideal swimming conditions. Feels soothing and warm, perfect for hours in the water without getting cold. Live readings load automatically.

What are the warmest months for swimming in Lumahaʻi Beach?

The highest water temperatures in Lumahaʻi Beach typically occur duringJanuary, February, April, May, June, July, August, September, October, November, December, when monthly averages reach peak seasonal levels.

What is the typical water temperature in Lumahaʻi Beach in September?

Historically in September, water temperatures in Lumahaʻi Beach average around27.1°C (80.8°F), fluctuating between a recorded minimum of 25.7°C and a maximum of 28.8°C.

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Lumahaʻi Beach Coastal Zone Map

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