Surf Forecasts:
Trá Na Rosan surf forecast from 18 Sep 2026:
- Best quality surf: Sunday 20 Sep, 7PM (local time) - 8ft (2.4m), 12s period, NW swell with offshore winds.
- Most powerful swell: Friday 18 Sep, 7AM (local time) - 11ft (3.5m), 13s period, NW swell with 4,398 kJ wave energy.
- Next surfable swell (1★+): Sunday 20 Sep, 7PM (local time) - 8ft (2.4m), 12s 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 (Sep 20) at 7PM. The primary swell is predicted to be 2.4m and 12s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Trá Na Rosan in the next 16 days are 3.5m 13s and forecast to arrive on Friday (Sep 18) at 7AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Thursday (Sep 24) at 10PM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7PM (Sun 20th Sep) | 8ft (2.4m) 12s |
| Best Surf | 7PM (Sun 20th Sep) | 8ft (2.4m) 12s |
| Most Powerful | 7AM (Fri 18th Sep) | 11ft (3.5m) 13s |
Table - best surf conditions forecast for Trá Na Rosan over the next 16 days.
Short Range ForecastLight rain (total 5mm), mostly falling on Fri afternoon. Very mild (max 16°C on Fri afternoon, min 11°C on Sun afternoon). Winds decreasing (strong winds from the WSW on Fri afternoon, light winds from the SSE by Sun afternoon). | Days 4-6 Weather SummaryModerate rain (total 11mm), heaviest on Wed morning. Very mild (max 19°C on Mon morning, min 10°C on Sun night). Winds increasing (light winds from the S on Mon night, fresh winds from the N by Wed morning). | ||||||||||||||||||||
Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | |||||||||||||||
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) | NW 13 | WNW 12 | WNW 11 | WNW 11 | WNW 12 | WNW 12 | NW 12 | NW 12 | NW 12 | WNW 12 | WNW 10 | WNW 10 | W 11 | W 11 | WNW 15 | WNW 13 | NW 12 | NW 11 | WNW 11 | NW 10 | WNW 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 3314 | 2946 | 1615 | 2258 | 3202 | 3410 | 2233 | 1572 | 1148 | 828 | 482 | 370 | 555 | 403 | 1546 | 1422 | 964 | 615 | 375 | 298 | 143 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross | cross | cross | cross | cross-on | cross | off | cross-off | cross | off | cross-off | on | cross | cross-on | cross-on | off | off | cross-off | cross-off |
High Tide | 11:02AM2.48m | 11:31PM2.22m | 12:19PM2.27m | 1:15AM2.06m | 2:25PM2.25m | 3:15AM2.13m | 3:50PM2.44m | 4:17AM2.33m | 4:38PM2.70m | 4:57AM2.56m | 5:13PM2.96m | 5:30AM2.79m | 5:44PM3.19m | ||||||||
Low Tide | 4:41AM1.08m | 5:20PM1.22m | 5:41AM1.31m | 6:56PM1.42m | 7:33AM1.42m | 9:03PM1.37m | 9:17AM1.28m | 10:12PM1.15m | 10:14AM1.03m | 10:52PM0.88m | 10:53AM0.77m | 11:25PM0.61m | 11:26AM0.52m | 11:54PM0.36m | |||||||
 | |  |  | | |  | |  |  | |  | | |  |  | |  | | | | |
 | 7:07 | — | — | 7:09 | — | — | 7:11 | — | — | 7:13 | — | — | 7:15 | — | — | 7:16 | — | — | 7:18 | — | — |
 | — | 7:42 | — | — | 7:38 | — | — | 7:36 | — | — | 7:34 | — | — | 7:30 | — | — | 7:29 | — | — | 7:25 | — |
mm | 2 | 2 | — | — | — | — | — | 1 | 4 | — | — | — | — | — | 1 | 6 | — | — | — | — | 1 |
Temp °C | 14 | 16 | 16 | 13 | 13 | 13 | 13 | 13 | 17 | 19 | 19 | 18 | 17 | 14 | 12 | 10 | 11 | 11 | 17 | 21 | 14 |
Feels °C | 7 | 8 | 9 | 4 | 4 | 4 | 7 | 9 | 13 | 15 | 16 | 18 | 15 | 12 | 9 | 3 | 7 | 8 | 10 | 17 | 10 |
Swell 1 Height (m) Direction Period (s) | NW 13 | — | — | — | — | — | NW 12 | NW 12 | NW 12 | WNW 12 | WNW 10 | WNW 10 | W 11 | W 11 | WNW 15 | WNW 13 | NW 12 | NW 11 | WNW 11 | NW 10 | WNW 11 |
| kJ | 3314 | — | — | — | — | — | 2233 | 1572 | 1148 | 828 | 482 | 370 | 555 | 403 | 1546 | 1422 | 964 | 615 | 375 | 298 | 143 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | N 8 | NW 19 | — | — | — | — | — | — | N 12 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 14 | — | — | — | — | — | — | 3 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | N 8 | — | — | — | — | — | — | E 6 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | 1 |
Wind waves Height (m) Direction Period (s) | — | WNW 12 | WNW 11 | WNW 11 | WNW 12 | WNW 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | SSE 3 | S 4 |
| kJ | — | 2946 | 1615 | 2258 | 3202 | 3410 | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 6 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 803 | 361 | 780 | 377 | 344 | 361 | 122 | 44 | 57 | 35 | 67 | 0 | 0 | 110 | 7 | 136 | 52 | 0 | 63 | 406 | 35 |
Best forecast wave conditions in Donegal | |||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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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