World sea water temperatures

Water temperature in Cardigan Bay

Home > United Kingdom > Wales > Cardigan Bay

This data the coastal Cardigan Bay sea water temperature today, tomorrow and the upcoming days. Besides, you can also get information about the weather and surf forecast, as well as the data on sunrise / sunset and moonrise / moonset at a given point on any given day.

Current sea temperature in Cardigan Bay

Water temperature in Cardigan Bay today is 18.7°C. Based on our historical data over a period of ten years, the warmest water in this day in the Irish Sea near Cardigan Bay was recorded in 2022 and was 18.5°C, and the coldest was recorded in 2015 at 16.1°C. Sea water temperature in Cardigan Bay is expected to drop to 16.6°C in the next 10 days. September average water temperature in Cardigan Bay is 16.6°C, the minimum temperature is 14.6°C, and the maximum is 19.4°C.

Throughout the year, the water temperature in Cardigan Bay does not rise above 20°C and therefore is not suitable for comfortable swimming. But on some days of August, the water temperature warms up to 20°C and above. The average water temperature in Cardigan Bay in winter reaches 7.8°C, in spring 9.6°C, in summer the average temperature rises to 16.6°C, and in autumn it is 14.1°C.

Cardigan Bay water temperature now


5 September 2025
today temp
18.7°C
4 September 2025
yesterday temp
18.4°C


The sea salinity in Cardigan Bay is 33.23‰, and the average salinity of the World Ocean is 35‰.

Surf Forecast in Cardigan Bay for today

Another important indicators for a comfortable holiday on the beach are the presence and height of the waves, as well as the speed and direction of the wind. Please find below data on the swell size for Cardigan Bay. We calculate the swell size based on the mean wave height (trough to crest) of each third highest wave. For more information on surf forecasts for the next ten days, please visit sea state forecast Cardigan Bay. Data in table shown for 5 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

0-3 h3-6 h6-9 h9-12 h
3' 2"3' 1"2' 9"2' 5"
0.96 m0.93 m0.84 m0.74 m
12-15 h15-18 h18-21 h21-24 h
2' 2"2' 0"1' 10"1' 9"
0.67 m0.61 m0.57 m0.54 m

Surf report in Cardigan Bay

Cardigan Bay wave height and direction

Cardigan Bay weather forecast

Cardigan Bay wind speed and direction

Current temperature and weather

Data in a table show Cardigan Bay temperature today (5 September 2025). For more information and forecast for a few days, go to the weather forecast Cardigan Bay.

0-3 h3-6 h6-9 h9-12 h
12.9°C12.8°C12.7°C14.7°C
12-15 h15-18 h18-21 h21-24 h
16.3°C16.2°C15°C12.3°C

You may also be interested in other sections of our site for Cardigan Bay: Sunrise and Sunset, Tides

Cardigan Bay water temperature by month

These figures shows the average, minimum and maximum monthly sea temperature in Cardigan Bay. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years. Using them, you can check the water temperature in Cardigan Bay on any day of this period that interests you. Click on the month link and you will see a table for each day, or alternatively you can view the temperature curve of the month and select 2 different years you want to compare, either in a table or as a curve

MonthAvrMinMax
January7.6°C5.1°C10.1°Ccold
Sea water temperature in Cardigan Bay in January
February7°C4.9°C9.5°Ccold
Sea water temperature in Cardigan Bay in February
March7.5°C4.9°C9.5°Ccold
Sea water temperature in Cardigan Bay in March
April9.3°C5.2°C11.6°Ccold
Sea water temperature in Cardigan Bay in April
May12.1°C8.9°C15.5°Ccold
Sea water temperature in Cardigan Bay in May
June15°C12°C17.7°Ccold
Sea water temperature in Cardigan Bay in June
July17.1°C14.5°C20.7°Ccold
Sea water temperature in Cardigan Bay in July
August17.6°C16.3°C20.4°Ccold
Sea water temperature in Cardigan Bay in August
September16.6°C14.6°C19.4°Ccold
Sea water temperature in Cardigan Bay in September
October14.3°C11.5°C16.8°Ccold
Sea water temperature in Cardigan Bay in October
November11.5°C8.8°C14.1°Ccold
Sea water temperature in Cardigan Bay in November
December8.9°C5.5°C11.1°Ccold
Sea water temperature in Cardigan Bay in December

Chart monthly average water temperature in Cardigan Bay

Water temperature in Cardigan Bay

Where is the warmest sea water in the world?

If you want to plan a vacation on the beach and enjoy the warm sea, choose the day of the year, region and the minimum comfortable sea/ocean temperature that interests you. As a result, you will get a list of countries and cities in which the average sea temperature or maximum temperature on this day over the past 10 years exceeds your chosen value

Region
Date (day and month)
Water temperature: min 16°C
 Average temperature  Maximum temperature

Nearby beaches and cities

The nearest beaches and cities from Cardigan Bay with the water temperature today, as well as the air temperature and the state of the weather during the day and the average wave height for today

WaterWeatherWave
Aberystwyth18.6°C16°C0.77 m
Borth18.5°C16°C0.77 m
Aberaeron18.6°C17°C0.78 m
Aberdyfi18.2°C16°C0.84 m
New Quay18.4°C17°C0.65 m
Llangrannog18°C17°C0.78 m
Tresaith18°C17°C0.78 m
Penbryn18°C17°C0.78 m
Fairbourne18.2°C16°C0.86 m
Aberporth17.9°C17°C0.85 m

Wales photo gallery

  • Nefyn beach on a sunny day in July
  • Nefyn Beach on a wet day in August
  • Early morning swimming in caswell bay
  • Nefyn beach from the Quay on a sunny day in July

If you have interesting photos of this place, you can upload them here. Photos will be available to all users after verification by the moderator.

Other names for Cardigan Bay

Bae Ceredigion

Vote for Wales best beach

Current rating: (0 votes cast)

If you know this place (Cardigan Bay) and want to leave your comment or rate it, then fill out the following form.

Your rating for this place:

Does this place have a "Blue Flag" award [1], are there rip currents and what type of beach is it, sand or pebble:

Is the beach a dog-friendly place, child friendly or a nudist beach?


Your comments for this place (water quality, crowds, facilities, activities, lifeguards, service etc.):



[1] - The "Blue Flag" is awarded to beaches which fulfill a number of criteria, including: the quality of the bathing water, which must be in accordance with the relevant European Union Directive environmental education and information and beach area management and safety.

Get widget or API for your website

Our report for Cardigan Bay is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.

Contact us: admin@seatemperature.info
privacy policy