Surf Forecasts:
Trá Na Rosan surf forecast from 21 Aug 2026:
- Best quality surf: Thursday 27 Aug, 1PM (local time) - 7.5ft (2.3m), 8s period, WNW swell with cross-offshore winds.
- Most powerful swell: Thursday 27 Aug, 1PM (local time) - 7.5ft (2.3m), 8s period, WNW swell with 669 kJ wave energy.
- Next surfable swell (1★+): Sunday 23 Aug, 10PM (local time) - 1.5ft (0.5m), 11s period with NW swell.
Best Forecast Surf Conditions for Trá Na Rosan this week:
The surf forecast for Trá Na Rosan over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 23) at 10PM. The primary swell is predicted to be 0.5m and 11s period with a secondary swell of 0.7m and 7s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Trá Na Rosan in the next 16 days are 2.3m 8s and forecast to arrive on Thursday (Aug 27) at 1PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 2s period and expected on Tuesday (Aug 25) at 4PM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Sun 23rd Aug) | 1.5ft (0.5m) 11s |
| Best Surf | 1PM (Thu 27th Aug) | 7.5ft (2.3m) 8s |
| Most Powerful | 1PM (Thu 27th Aug) | 7.5ft (2.3m) 8s |
Table - best surf conditions forecast for Trá Na Rosan over the next 16 days.
Short Range ForecastLight rain (total 2mm), mostly falling on Fri morning. Very mild (max 15°C on Sat afternoon, min 13°C on Fri morning). Winds decreasing (fresh winds from the N on Fri morning, light winds from the N by Sat morning). | Days 4-6 Weather SummaryLight rain (total 9mm), mostly falling on Tue night. Warm (max 20°C on Mon afternoon, min 14°C on Mon morning). Winds increasing (light winds from the ESE on Mon morning, fresh winds from the ESE by Tue night). | ||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | NNW 6 | NNW 6 | NNW 6 | NNW 5 | W 9 | NW 5 | WNW 9 | NW 7 | NW 10 | NW 11 | WNW 10 | WNW 10 | WNW 9 | W 9 | W 9 | W 8 | W 8 | NW 12 | WNW 9 | WNW 8 | WNW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 121 | 117 | 53 | 23 | 14 | 7 | 16 | 28 | 240 | 423 | 267 | 232 | 118 | 87 | 38 | 20 | 10 | 21 | 474 | 669 | 376 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | on | cross-on | cross | cross-off | cross-on | off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-on |
High Tide | 1:14PM2.29m | 2:05AM2.16m | 3:02PM2.30m | 3:46AM2.23m | 4:20PM2.48m | 4:46AM2.41m | 5:09PM2.71m | 5:27AM2.61m | 5:46PM2.95m | 6:01AM2.80m | 6:19PM3.18m | 6:32AM2.96m | 6:49PM3.36m | ||||||||
Low Tide | 7:41PM1.35m | 8:20AM1.35m | 9:27PM1.31m | 9:49AM1.23m | 10:36PM1.13m | 10:45AM1.00m | 11:21PM0.90m | 11:25AM0.76m | 11:56PM0.67m | 11:58AM0.53m | 00:27AM0.46m | 12:29PM0.33m | 00:57AM0.28m | ||||||||
 |  |  |  | |  |  | | | | |  | | |  | |  | | | |  | |
 | 6:15 | — | — | 6:16 | — | — | 6:18 | — | — | 6:20 | — | — | 6:22 | — | — | 6:24 | — | — | 6:26 | — | — |
 | — | 8:52 | — | — | 8:50 | — | — | 8:46 | — | — | 8:45 | — | — | 8:43 | — | — | 8:39 | — | — | 8:37 | — |
mm | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — | 4 | 3 | — | 3 | 9 |
Temp °C | 13 | 14 | 14 | 14 | 15 | 14 | 14 | 14 | 14 | 18 | 20 | 17 | 15 | 17 | 16 | 17 | 16 | 16 | 16 | 17 | 16 |
Feels °C | 7 | 8 | 9 | 12 | 12 | 12 | 12 | 13 | 12 | 16 | 17 | 14 | 11 | 12 | 11 | 13 | 12 | 13 | 15 | 17 | 15 |
Swell 1 Height (m) Direction Period (s) | WNW 8 | WNW 8 | W 8 | NNW 5 | NNW 5 | NW 5 | NW 6 | NW 7 | NW 10 | NW 11 | WNW 10 | WNW 10 | WNW 9 | W 9 | W 9 | W 8 | W 8 | WNW 7 | N 8 | N 8 | WNW 8 |
| kJ | 21 | 11 | 6 | 23 | 7 | 7 | 8 | 28 | 240 | 423 | 267 | 232 | 118 | 87 | 38 | 20 | 10 | 18 | 5 | 5 | 376 |
Swell 2 Height (m) Direction Period (s) | W 15 | W 17 | WNW 7 | W 9 | W 9 | W 8 | WNW 9 | WNW 8 | W 15 | W 15 | — | — | — | — | NW 9 | ENE 5 | WNW 8 | NW 12 | — | — | N 8 |
| kJ | 4 | 6 | 5 | 13 | 14 | 6 | 16 | 13 | 5 | 4 | — | — | — | — | 3 | 2 | 6 | 21 | — | — | 1 |
Swell 3 Height (m) Direction Period (s) | — | — | W 16 | NW 7 | W 16 | WNW 6 | WNW 5 | NW 11 | — | — | — | — | — | — | N 9 | NW 8 | ENE 5 | N 8 | — | — | — |
| kJ | — | — | 5 | 2 | 5 | 3 | 6 | 5 | — | — | — | — | — | — | 2 | 3 | 2 | 5 | — | — | — |
Wind waves Height (m) Direction Period (s) | NNW 6 | NNW 6 | NNW 6 | — | WNW 6 | — | — | — | — | — | — | — | ESE 2 | E 2 | E 2 | ESE 2 | — | — | WNW 9 | WNW 8 | — |
| kJ | 121 | 117 | 53 | — | 8 | — | — | — | — | — | — | — | 1 | 2 | 1 | 1 | — | — | 474 | 669 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 326 | 326 | 274 | 144 | 202 | 202 | 202 | 82 | 0 | 0 | 0 | 0 | 14 | 29 | 140 | 32 | 202 | 2 | 0 | 7 | 136 |
Best forecast wave conditions in Donegal | |||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Trá Na Rosan surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Trá Na Rosan Surf forecast
The above surf forecast table for Trá Na Rosan provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Trá Na Rosan can be found by selecting the local surf guide option on the grey menu. Our Trá Na Rosan surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Trá Na Rosan) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Trá Na Rosan may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Are you planning a holiday in Donegal? If you are looking for accommodation near Trá Na Rosan, camping, hotels and holiday cottages in Donegal, consider staying in Letterkenny which is 31 km (19 miles) away. Other places in and around Donegal where you can find information about places to rent, and car hire include Malin Head which is 35 km (22 miles) away, Derry, Derry and Londonderry County Borough.
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