Massachusetts, United States
James Bay41.45°N, 70.55°WStation UN-MAS-SEA

Seaview Beach Sea Water Temperature

A temperate beach on the James Bay, warmest around August at about 21.4°C. Today's reading, 7-day forecast, and monthly averages below.

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

Seaview Beach water temperature

20
68°FComfortable (20°C – 24°C)

Pleasant and revitalizing. Great for most beachgoers and active recreational swimming.

+0°vs Sep avgJames Bay41.45°N, 70.55°W
Activity Index:SwimmingSnorkelingSurfingTypical conditions
Marine Atmosphere Grid Live Marine Feed
Coastal Air
22°C
70.7°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
20°C
68°F
Waves: 1m
Comfortable
ThuOct 1
20.3°C
68.5°F
Waves: 0.9m
Comfortable
FriOct 2
20.4°C
68.7°F
Waves: 0.7m
Comfortable
SatOct 3
20.3°C
68.5°F
Waves: 0.6m
Comfortable
SunOct 4
20°C
68°F
Waves: 0.7m
Comfortable
MonOct 5
19.7°C
67.5°F
Waves: 0.9m
Refreshing
TueOct 6
19.6°C
67.3°F
Waves: 1m
Refreshing
Forecast cooling trend: -0.4°C over 7 days at Seaview Beach.
Confidence: High

Seaview Beach Monthly Water Temperature Averages

Historical monthly climatology. The warmest water in Seaview Beach occurs inJuly, August, September, October — peaking at21.4°C (70.5°F) in August.

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

Hover a bar for details
Current month Comfortable (20–24°C) Warm (24°C+) Cool (<20°C)
6
Jan
3
Feb
4
Mar
7
Apr
11
May
16
Jun
20
Jul
21
Aug
Current
20
Sep
16
Oct
12
Nov
9
Dec
Full 12-month data table — min / avg / max & swimming comfort
MonthMin Water TempAverage Water TempMax Water TempSwimming Comfort
January2.3°C5.5°C8.4°CVery Cold (< 16°C)
February1.6°C3.4°C5.9°CVery Cold (< 16°C)
March0.3°C3.9°C7°CVery Cold (< 16°C)
April3.6°C7.1°C11.2°CVery Cold (< 16°C)
May8.5°C11.3°C16.4°CVery Cold (< 16°C)
June10.3°C16.2°C19.2°CCool / Refreshing (16°C – 20°C)
July17.1°C20.2°C23.4°CComfortable (20°C – 24°C)
August18°C21.4°C25°CComfortable (20°C – 24°C)
SeptemberCurrent16.9°C20°C22.5°CComfortable (20°C – 24°C)
October13.4°C16.4°C19.6°CCool / Refreshing (16°C – 20°C)
November9.7°C12.3°C16.2°CVery Cold (< 16°C)
December6°C8.5°C10.8°CVery Cold (< 16°C)

Swimming FAQs for Seaview Beach

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

Typical sea surface temperature in Seaview Beach this time of year is 20°C (68°F) — classified as Comfortable (20°C – 24°C). Pleasant and revitalizing. Great for most beachgoers and active recreational swimming. Live readings load automatically.

What are the warmest months for swimming in Seaview Beach?

The highest water temperatures in Seaview Beach typically occur duringJuly, August, September, October, when monthly averages reach peak seasonal levels.

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

Historically in September, water temperatures in Seaview Beach average around20°C (68.0°F), fluctuating between a recorded minimum of 16.9°C and a maximum of 22.5°C.

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Seaview Beach Coastal Zone Map

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