New Brunswick, Canada
James Bay45.63°N, 64.85°WStation CA-NEW-DEN

Dennis Beach Sea Water Temperature

A cool beach on the James Bay, warmest around September at about 15.3°C. Today's reading, 7-day forecast, and monthly averages below.

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

Dennis Beach water temperature

15.3
59.5°FVery Cold (< 16°C)

Wetsuit strongly recommended. Sudden entry may cause cold shock. Suitable only for brief, brisk plunges.

+0°vs Sep avgJames Bay45.63°N, 64.85°W
Activity Index:SwimmingSnorkelingSurfingTypical conditions
Marine Atmosphere Grid Live Marine Feed
Coastal Air
17°C
62.2°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
15.3°C
59.5°F
Waves: 1m
Very Cold
ThuOct 1
15.6°C
60.1°F
Waves: 0.9m
Very Cold
FriOct 2
15.7°C
60.3°F
Waves: 0.7m
Very Cold
SatOct 3
15.6°C
60.1°F
Waves: 0.6m
Very Cold
SunOct 4
15.3°C
59.5°F
Waves: 0.7m
Very Cold
MonOct 5
15°C
59°F
Waves: 0.9m
Very Cold
TueOct 6
14.9°C
58.8°F
Waves: 1m
Very Cold
Forecast cooling trend: -0.4°C over 7 days at Dennis Beach.
Confidence: High

Dennis Beach Monthly Water Temperature Averages

Historical monthly climatology. The warmest water in Dennis Beach occurs inJuly, August, September, October — peaking at15.3°C (59.5°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)
3
Jan
1
Feb
1
Mar
2
Apr
5
May
9
Jun
13
Jul
15
Aug
Current
15
Sep
14
Oct
10
Nov
6
Dec
Full 12-month data table — min / avg / max & swimming comfort
MonthMin Water TempAverage Water TempMax Water TempSwimming Comfort
January-0.3°C3.1°C5.9°CVery Cold (< 16°C)
February-1°C1.2°C3.7°CVery Cold (< 16°C)
March-1.4°C0.9°C3.4°CVery Cold (< 16°C)
April-1°C2.3°C6.1°CVery Cold (< 16°C)
May-0.3°C5.2°C8.2°CVery Cold (< 16°C)
June7.2°C9.4°C11.9°CVery Cold (< 16°C)
July9°C12.5°C16.4°CVery Cold (< 16°C)
August12.8°C14.6°C16.2°CVery Cold (< 16°C)
SeptemberCurrent13.6°C15.3°C17.1°CVery Cold (< 16°C)
October10.8°C13.7°C15.6°CVery Cold (< 16°C)
November8.1°C10.4°C13.7°CVery Cold (< 16°C)
December-0.1°C6.2°C9.3°CVery Cold (< 16°C)

Swimming FAQs for Dennis Beach

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

Typical sea surface temperature in Dennis Beach this time of year is 15.3°C (59.5°F) — classified as Very Cold (< 16°C). Wetsuit strongly recommended. Sudden entry may cause cold shock. Suitable only for brief, brisk plunges. Live readings load automatically.

What are the warmest months for swimming in Dennis Beach?

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

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

Historically in September, water temperatures in Dennis Beach average around15.3°C (59.5°F), fluctuating between a recorded minimum of 13.6°C and a maximum of 17.1°C.

Other Beaches in Canada

Explore all Canada stations

Dennis Beach Coastal Zone Map

Live OpenStreetMap