What is the current water temperature in Caernarfon?

Q: What is the current water temperature in Caernarfon?

As of now, in Caernarfon, the water temperature is 7.35°C. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration.

United Kingdom > Caernarfon

Water temperature in Caernarfon

Detailed information about the current water temperature in Caernarfon. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.

45.2

°F

January 16, 16:49

Trend:

stable

Yesterday:

45.1°F

Tomorrow:

45.1°F

Sunrise:

08:23

Sunset:

16:31

Day Length:

8 h. 8 min.

Caernarfon in January

Minimum:

45.6°F

Average:

48.1°F

Maximum:

50.5°F

Sea water temperature in Caernarfon today

As of now, in Caernarfon, the water temperature is 45.2°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 1.4°F lower than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to stay about the same.

Recent sea temperature and forecast

Today's water temperature is considerably lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 48.3°F on 2016, while the historical minimum was 45.2°F on 2025.

latest data

last year

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the minimum recorded over the past years. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 44.9°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Caernarfon

Date	Current Year actual* / forecast**	last year	10 years average
Jan 2	47.5°F	46.6°F	48.0°F
Jan 3	46.9°F	47.0°F	48.0°F
Jan 4	46.9°F	46.9°F	48.1°F
Jan 5	46.9°F	47.0°F	48.0°F
Jan 6	46.7°F	47.0°F	47.9°F
Jan 7	46.6°F	47.0°F	47.6°F
Jan 8	46.7°F	46.6°F	47.6°F
Jan 9	46.7°F	46.0°F	47.5°F
Jan 10	46.5°F	45.8°F	47.3°F
Jan 11	46.3°F	45.9°F	47.2°F
Jan 12	46.1°F	45.8°F	47.0°F
Jan 13	46.0°F	45.9°F	47.0°F
Jan 14	45.7°F	46.0°F	46.9°F
Jan 15	45.1°F	45.5°F	46.6°F
Jan 16	45.2°F	45.2°F	46.7°F
Jan 17	45.1°F	45.4°F	46.5°F
Jan 18	44.9°F	45.5°F	46.3°F
Jan 19	45.0°F	45.4°F	46.4°F
Jan 20	44.9°F	45.8°F	46.3°F
Jan 21	44.9°F	46.0°F	46.3°F
Jan 22	44.9°F	46.3°F	46.3°F
Jan 23	44.8°F	45.9°F	46.2°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in Caernarfon by month

In an average year, Caernarfon offers no days when the water temperature is warm enough to swim comfortably.

The warmest water in Caernarfon was recorded on July 22, 2021, reaching a 66.9°F. While the coldest temperature occurred on March 11, 2018, dipping to 42.3°F. The average readings by season are 47.3°F in Winter, 49.3°F in Spring, 60.2°F in Summer, and 57.3°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Bangor	43.6°F	8mi
Holyhead	46.6°F	19mi
Conwy	42.4°F	21mi
Aberystwyth	44.3°F	51mi

* current water temperature in this city

** straight line distance from Caernarfon