Conwy, United Kingdom
Irish Sea53.33°N, 3.78°WStation UN-CON-POR

Porth Dyniewaid Sea Water Temperature

A cool beach on the Irish Sea, warmest around August at about 16°C. Today's reading, 7-day forecast, and monthly averages below.

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

Porth Dyniewaid water temperature

15.8
60.4°FVery Cold (< 16°C)

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

+0°vs Sep avgIrish Sea53.33°N, 3.78°W
Activity Index:SwimmingSnorkelingSurfingTypical conditions
Marine Atmosphere Grid Live Marine Feed
Coastal Air
17°C
63.1°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
15.8°C
60.4°F
Waves: 1m
Very Cold
ThuOct 1
16.1°C
61°F
Waves: 0.9m
Refreshing
FriOct 2
16.2°C
61.2°F
Waves: 0.7m
Refreshing
SatOct 3
16.1°C
61°F
Waves: 0.6m
Refreshing
SunOct 4
15.8°C
60.4°F
Waves: 0.7m
Very Cold
MonOct 5
15.5°C
59.9°F
Waves: 0.9m
Very Cold
TueOct 6
15.4°C
59.7°F
Waves: 1m
Very Cold
Forecast cooling trend: -0.4°C over 7 days at Porth Dyniewaid.
Confidence: High

Porth Dyniewaid Monthly Water Temperature Averages

Historical monthly climatology. The warmest water in Porth Dyniewaid occurs inJuly, August, September, October — peaking at16°C (60.8°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)
8
Jan
7
Feb
7
Mar
9
Apr
11
May
13
Jun
15
Jul
16
Aug
Current
16
Sep
14
Oct
12
Nov
10
Dec
Full 12-month data table — min / avg / max & swimming comfort
MonthMin Water TempAverage Water TempMax Water TempSwimming Comfort
January6.4°C8.2°C9.7°CVery Cold (< 16°C)
February6.1°C7.4°C8.9°CVery Cold (< 16°C)
March5.9°C7.3°C8.5°CVery Cold (< 16°C)
April7.3°C8.7°C10.3°CVery Cold (< 16°C)
May9.2°C10.7°C12.4°CVery Cold (< 16°C)
June12.3°C13.3°C14.8°CVery Cold (< 16°C)
July13.8°C15°C16.8°CVery Cold (< 16°C)
August15.2°C16°C17.8°CCool / Refreshing (16°C – 20°C)
SeptemberCurrent14.2°C15.8°C17.6°CVery Cold (< 16°C)
October13°C14.4°C15.9°CVery Cold (< 16°C)
November9.9°C11.7°C13.7°CVery Cold (< 16°C)
December7.9°C9.7°C11.6°CVery Cold (< 16°C)

Swimming FAQs for Porth Dyniewaid

Is the sea warm enough to swim in Porth Dyniewaid today?

Typical sea surface temperature in Porth Dyniewaid this time of year is 15.8°C (60.4°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 Porth Dyniewaid?

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

What is the typical water temperature in Porth Dyniewaid in September?

Historically in September, water temperatures in Porth Dyniewaid average around15.8°C (60.4°F), fluctuating between a recorded minimum of 14.2°C and a maximum of 17.6°C.

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