Surf Forecasts:
Trá Na Rosan surf forecast from 13 Aug 2026:
- Best quality surf: Sunday 16 Aug, 1AM (local time) - 3.5ft (1.1m), 8s period, NW swell with cross-offshore winds.
- Most powerful swell: Wednesday 19 Aug, 4PM (local time) - 6.5ft (2.0m), 8s period, WNW swell with 464 kJ wave energy.
- Next surfable swell (1★+): Sunday 16 Aug, 1AM (local time) - 3.5ft (1.1m), 8s 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 16) at 1AM. The primary swell is predicted to be 1.1m and 8s period. 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 2.0m 8s and forecast to arrive on Wednesday (Aug 19) at 4PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 7s period and expected on Monday (Aug 17) at 10PM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Sun 16th Aug) | 3.5ft (1.1m) 8s |
| Best Surf | 1AM (Sun 16th Aug) | 3.5ft (1.1m) 8s |
| Most Powerful | 4PM (Wed 19th Aug) | 6.5ft (2.0m) 8s |
Table - best surf conditions forecast for Trá Na Rosan over the next 16 days.
Short Range ForecastModerate rain (total 11mm), heaviest on Thu afternoon. Warm (max 21°C on Thu morning, min 11°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 11mm), heaviest on Mon night. Very mild (max 16°C on Mon morning, min 12°C on Sun morning). Winds increasing (light winds from the SSE on Sun morning, fresh winds from the WSW by Mon night). | ||||||||||||||||||||
Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | |||||||||||||||
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) | W 10 | W 10 | W 9 | W 9 | W 8 | WNW 8 | WNW 8 | WNW 8 | NW 8 | NW 8 | NW 7 | W 10 | W 8 | W 8 | W 7 | WNW 8 | W 8 | WNW 8 | WNW 7 | WNW 8 | NW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 133 | 123 | 111 | 78 | 69 | 92 | 161 | 154 | 138 | 82 | 54 | 48 | 51 | 31 | 269 | 210 | 168 | 173 | 320 | 464 | 390 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-off | off | off | off | cross-off | off | cross | cross | cross-on | cross | cross-on | cross-on | cross-on |
High Tide | 7:32PM3.82m | 7:53AM3.34m | 8:12PM3.83m | 8:31AM3.31m | 8:50PM3.71m | 9:09AM3.20m | 9:28PM3.49m | 9:45AM3.05m | 10:05PM3.20m | 10:23AM2.86m | 10:43PM2.87m | 11:03AM2.65m | 11:26PM2.56m | ||||||||
Low Tide | 1:07PM-0.05m | 1:43AM-0.12m | 1:48PM-0.11m | 2:23AM-0.10m | 2:27PM-0.06m | 3:00AM0.03m | 3:05PM0.09m | 3:37AM0.24m | 3:44PM0.32m | 4:13AM0.50m | 4:24PM0.60m | 4:51AM0.78m | 5:09PM0.91m | ||||||||
 |  |  |  |  |  | | |  | | | | | | | | | | | | | |
 | 6:00 | — | — | 6:01 | — | — | 6:03 | — | — | 6:05 | — | — | 6:07 | — | — | 6:09 | — | — | 6:11 | — | — |
 | — | — | 9:10 | — | — | 9:07 | — | — | 9:06 | — | — | 9:04 | — | — | 9:01 | — | 8:59 | — | — | 8:57 | — |
mm | 1 | 5 | 2 | — | — | — | — | — | 3 | 1 | — | — | — | 4 | 4 | — | — | 2 | 2 | — | 1 |
Temp °C | 21 | 21 | 17 | 14 | 15 | 14 | 13 | 14 | 13 | 14 | 15 | 15 | 16 | 15 | 16 | 14 | 15 | 15 | 14 | 14 | 14 |
Feels °C | 21 | 22 | 17 | 11 | 12 | 11 | 9 | 10 | 11 | 13 | 13 | 14 | 14 | 12 | 11 | 12 | 12 | 12 | 9 | 8 | 10 |
Swell 1 Height (m) Direction Period (s) | W 10 | W 10 | W 9 | W 9 | N 10 | WNW 9 | N 9 | WNW 8 | NW 8 | NW 8 | NW 7 | W 10 | W 8 | W 8 | N 7 | N 8 | W 17 | W 17 | — | W 17 | W 16 |
| kJ | 133 | 123 | 111 | 78 | 2 | 8 | 2 | 154 | 138 | 82 | 54 | 48 | 51 | 31 | 4 | 1 | 6 | 6 | — | 6 | 5 |
Swell 2 Height (m) Direction Period (s) | N 7 | — | N 11 | N 10 | — | N 9 | — | N 9 | — | NNW 9 | N 9 | NW 7 | NNW 8 | N 7 | — | W 16 | — | N 7 | — | — | — |
| kJ | 1 | — | 2 | 2 | — | 2 | — | 1 | — | 28 | 39 | 16 | 19 | 10 | — | 5 | — | 1 | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | W 8 | N 8 | NW 6 | NW 6 | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | 1 | 33 | 6 | 1 | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | W 8 | WNW 8 | WNW 8 | — | — | — | — | — | — | — | W 7 | WNW 8 | W 8 | WNW 8 | WNW 7 | WNW 8 | NW 8 |
| kJ | — | — | — | — | 69 | 92 | 161 | — | — | — | — | — | — | — | 269 | 210 | 168 | 173 | 320 | 464 | 390 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 35 | 35 | 169 | 794 | 593 | 274 | 1070 | 0 | 0 | 0 | 0 | 0 | 2 | 177 | 35 | 363 | 122 | 330 | 398 | 169 |
Best forecast wave conditions in Donegal | |||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||
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FREE! Surf-Forecast.com widget for your website
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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