Home › Sauna & swim tide guide
The short answer
Two hours either side of high water. That is the working window at most Irish sea sauna spots. Inside it you can get in off the steps or slip without picking your way over weed and rock. Outside it you are usually walking.
Three things change that answer:
- Shape of the shore. A steep slip holds water longer than a wide flat strand. On a shallow beach the sea can retreat hundreds of metres, so you want mid to high.
- Spring or neap. A spring tide has the biggest range of the fortnight. More water at the top, far less at the bottom, and it moves faster between the two.
- Wind. An onshore blow stacks water against the shore and makes entry rough. Gusts over 25 knots will spoil a perfect tide.
Today's windows at popular sea swimming spots
| Location | Next high water | Best window | Sea temp |
|---|---|---|---|
| Dublin | 13:15 | 11:15–15:15 | 16.8°C |
| Howth | 13:05 | 11:05–15:05 | 16.4°C |
| Bray | 13:15 | 11:15–15:15 | 16.5°C |
| Dungarvan | 19:10 | 17:10–21:10 | 15.4°C |
| Crosshaven | 18:55 | 16:55–20:55 | 15.2°C |
| Kinsale | 18:50 | 16:50–20:50 | 15.0°C |
| Lahinch | 18:45 | 16:45–20:45 | 16.5°C |
| Galway | 18:45 | 16:45–20:45 | 17.0°C |
| Sligo | 19:40 | 17:40–21:40 | 16.6°C |
| Killybegs | 19:40 | 17:40–21:40 | 16.4°C |
Windows are two hours either side of high water at the nearest official station. Your own slip may differ by a few minutes.
Reading the window on any location page
Every location page on this site carries a swim and sauna verdict. It scores three things: how close you are to high water, the current gust strength, and modelled sea temperature. Good means all three line up. Poor means at least two are against you.
It is a convenience, not a safety rating. Cold water shock, rips and offshore wind are real. Check conditions yourself, swim with other people, and know your exit before you get in.
Common questions
- What tide is best for a sea sauna?
- At a slip, steps or pier, aim for the two hours either side of high water. That is when there is enough depth to get in properly without a long walk over rock or weed. On a wide shallow strand the water moves a long way, so mid to high water on a rising tide is usually the better window.
- Is high tide or low tide better for swimming?
- For most Irish sea sauna spots, high tide. They are built at slips and steps where low water leaves rock, mud or a long walk. On a surf beach the answer flips, because low to mid tide often gives the cleaner bank.
- Does a spring tide change the sauna window?
- Yes. A spring tide has a bigger range, so the water comes in further and drops further, and it runs faster. The high water window feels shorter and the low water exposure is greater. A neap tide is gentler at both ends.
- Does wind matter as much as tide?
- Often more. An onshore gust over 25 knots will make a slip entry unpleasant and can make it unsafe, even at perfect high water. We show wind, direction and maximum gust on every location page for that reason.