Tywyn — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Tywyn (Wales, United Kingdom). It includes the current water temperature, daily data for the last month presented in a simple chart, and a 7-day forecast. The page also compares today’s value with typical averages for this period, shows usual monthly ranges during the year, and lists nearby beaches with short descriptions. Local weather for the next few days and general details about Tywyn help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Tywyn in the Celtic Sea today is 20°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 68°F (20°C) to 74°F (23°C). The water is warm and pleasant for swimming, and in this range, one can stay in the water for extended periods without the risk of hypothermia. This is the ideal temperature for relaxation, swimming, and water sports. Families with children, as well as outdoor enthusiasts, will enjoy swimming and time spent in the water. For most people, this is the optimal temperature for a comfortable beach experience.
It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.
Water Temperature Chart Over the Last 30 Days
Water temperature in Tywyn has fallen over the last month but risen over the last 7 days. Currently, the sea water at this location is slightly warmer than average for this day in previous years.
According to our forecast, Water temperature in Tywyn will be 16.9°C in the next 7 days. See the table below for daily data for the upcoming week.
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| AUG 8 | 19.4°C | 17.0°C | |
| AUG 9 | 19.4°C | 18.0°C | |
| AUG 10 | 19.4°C | 17.8°C | |
| AUG 11 | 19.5°C | 17.8°C | |
| AUG 12 | 19.7°C | 18.0°C | |
| AUG 13 | 19.8°C | 18.0°C | |
| AUG 14 | 19.9°C | 18.3°C | |
| AUG 15 | 20.3°C | 17.5°C | |
| AUG 16 | 20.1°C | 16.3°C | 20.1°C |
| AUG 17 | 17.3°C | 19.6°C | |
| AUG 18 | 16.3°C | 19.2°C | |
| AUG 19 | 16.5°C | 18.7°C | |
| AUG 20 | 16.8°C | 18.3°C | |
| AUG 21 | 16.5°C | 17.8°C | |
| AUG 22 | 15.8°C | 17.3°C | |
| AUG 23 | 16.8°C | 16.9°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.
Water temperature data for this location is gathered from various sources, including buoys and satellite sea and ocean surface maps provided by the NOAA agency. We also incorporate data from local authorities in each specific location worldwide to ensure more accurate temperature readings.
Annual Water Temperature Overview by Month
Monthly Water Temp Ranges
Annual Water Temperature Trend
Tywyn sits on the southern edge of Cardigan Bay in Gwynedd, Wales, offering a long sweep of sandy beach backed by dunes and a shallow estuary at the mouth of the Afon Dysynni. Sea temperatures around Tywyn vary by season and are generally cool. In winter (December–February) surface water typically ranges from about 7°C to 9°C. Spring (March–May) sees a gradual rise to roughly 8°C–12°C. Summer (June–August) brings the warmest conditions, with averages commonly between 13°C and 17°C and occasional short-lived peaks up to around 18°C during warm spells. In autumn (September–November) temperatures usually fall back into the 11°C–14°C band. Local conditions such as tides, wind and recent weather can shift these figures noticeably from day to day.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 6°C | 9°C | 11°C |
| February | 6°C | 8°C | 10°C |
| March | 6°C | 8°C | 10°C |
| April | 7°C | 9°C | 11°C |
| May | 9°C | 11°C | 14°C |
| June | 11°C | 14°C | 17°C |
| July | 13°C | 16°C | 20°C |
| August | 14°C | 17°C | 19°C |
| September | 14°C | 16°C | 19°C |
| October | 12°C | 15°C | 17°C |
| November | 10°C | 12°C | 14°C |
| December | 7°C | 9°C | 13°C |
* Click on a month to view detailed water temperature data.
Tywyn: Weather Forecast
August 18
August 19
August 20
Location, Beaches & Local Information
Nearby Beaches & Facilities
Tywyn Beach
Aberdyfi Beach
Cae Du Campsite
Ynyslas
Ynyslas Beach
Llwyngwril Beach
Swimming Conditions
The beach and estuary make Tywyn attractive for swimming and a broader range of water activities, but conditions call for sensible preparation. The sheltered estuary and shallow shoreline warm slightly faster and are often calmer for families and less confident swimmers, while the open bay can be cooler and subject to tides and currents; rip currents may form on certain wind and swell conditions. Seasonal lifeguard cover is present on some Welsh beaches, and many visitors choose wetsuits outside the warmest weeks to extend their time in the water. Besides bathing, Tywyn supports paddleboarding, kayaking and surfing when conditions permit, and organised open-water swims and local clubs offer guided outings. Facilities in town and easy beach access make it a practical base for a coastal holiday focused on sea swimming and watersports, provided swimmers respect tide times and local safety advice.