Surf Forecasts:
Trá Na Rosan surf forecast from 5 Aug 2026:
- Best quality surf: Friday 7 Aug, 10PM (local time) - 5.5ft (1.7m), 10s period, WNW swell with cross-offshore winds.
- Most powerful swell: Wednesday 5 Aug, 7PM (local time) - 8ft (2.5m), 9s period, NW swell with 1,108 kJ wave energy.
- Next surfable swell (1★+): Friday 7 Aug, 10PM (local time) - 5.5ft (1.7m), 10s period with WNW 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 Friday (Aug 07) at 10PM. The primary swell is predicted to be 1.7m and 10s 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 2.5m 9s and forecast to arrive on Wednesday (Aug 05) at 7PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 2s period and expected on Saturday (Aug 08) at 4AM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Fri 7th Aug) | 5.5ft (1.7m) 10s |
| Best Surf | 10PM (Fri 7th Aug) | 5.5ft (1.7m) 10s |
| Most Powerful | 7PM (Wed 5th Aug) | 8ft (2.5m) 9s |
Table - best surf conditions forecast for Trá Na Rosan over the next 16 days.
Short Range ForecastModerate rain (total 10mm), heaviest on Wed morning. Very mild (max 16°C on Fri morning, min 12°C on Thu night). Winds decreasing (strong winds from the NW on Wed morning, moderate winds from the WSW by Fri afternoon). | Days 4-6 Weather SummaryHeavy rain (total 20mm), heaviest during Sun afternoon. Very mild (max 17°C on Sat morning, min 13°C on Sat afternoon). Winds increasing (light winds from the SSW on Fri night, strong winds from the NW by Sun night). | ||||||||||||||||||||
Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | |||||||||||||||
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 8 | NW 8 | NW 8 | NNW 7 | W 6 | W 5 | W 8 | WNW 10 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 10 | WNW 10 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | N 10 | N 10 | NW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 646 | 1010 | 602 | 117 | 30 | 41 | 221 | 772 | 452 | 276 | 318 | 408 | 746 | 631 | 389 | 307 | 236 | 120 | 127 | 94 | 40 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross | cross-off | cross-off | cross | off | cross-off | cross-on | cross | cross | cross-off | cross-on | cross-on | cross-on | cross | off | cross-on | off |
High Tide | 11:00AM2.71m | 11:22PM2.86m | 11:56AM2.58m | 00:27AM2.67m | 1:13PM2.50m | 1:55AM2.55m | 2:47PM2.57m | 3:29AM2.61m | 4:09PM2.80m | 4:43AM2.80m | 5:12PM3.12m | 5:41AM3.02m | 6:03PM3.43m | ||||||||
Low Tide | 4:48AM0.59m | 5:00PM0.72m | 5:40AM0.76m | 6:01PM0.90m | 6:48AM0.92m | 7:25PM1.02m | 8:15AM0.97m | 9:01PM0.95m | 9:39AM0.85m | 10:22PM0.72m | 10:46AM0.62m | 11:25PM0.43m | 11:39AM0.35m | 00:16AM0.16m | |||||||
 | |  |  | |  | | |  |  | | | |  | |  | |  | | | | |
 | 5:45 | — | — | 5:47 | — | — | 5:48 | — | — | 5:50 | — | — | 5:52 | — | — | 5:54 | — | — | 5:56 | — | — |
 | — | — | 9:28 | — | — | 9:25 | — | — | 9:23 | — | — | 9:21 | — | — | 9:19 | — | — | 9:16 | — | — | 9:15 |
mm | 4 | 2 | 1 | — | — | — | — | — | — | — | 3 | — | — | 9 | 8 | — | — | — | — | — | — |
Temp °C | 13 | 13 | 14 | 14 | 15 | 14 | 16 | 16 | 16 | 17 | 14 | 14 | 15 | 14 | 14 | 14 | 14 | 13 | 15 | 18 | 18 |
Feels °C | 5 | 5 | 8 | 10 | 10 | 10 | 10 | 10 | 13 | 13 | 9 | 10 | 10 | 12 | 9 | 9 | 11 | 10 | 14 | 17 | 16 |
Swell 1 Height (m) Direction Period (s) | — | — | — | NNW 7 | N 6 | N 6 | N 6 | WNW 10 | WNW 9 | WNW 9 | N 10 | N 9 | WNW 10 | N 8 | N 8 | NNW 9 | WNW 8 | WNW 8 | NW 8 | N 10 | N 9 |
| kJ | — | — | — | 117 | 29 | 7 | 1 | 772 | 452 | 276 | 2 | 6 | 746 | 5 | 1 | 28 | 236 | 120 | 88 | 94 | 40 |
Swell 2 Height (m) Direction Period (s) | — | — | — | WNW 10 | WNW 10 | WNW 9 | — | — | — | — | — | — | N 9 | — | N 10 | — | N 9 | N 9 | N 10 | NW 8 | NW 8 |
| kJ | — | — | — | 9 | 9 | 8 | — | — | — | — | — | — | 6 | — | 2 | — | 40 | 76 | 127 | 67 | 39 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 10 | W 9 | W 9 | W 12 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 2 | 2 | 11 |
Wind waves Height (m) Direction Period (s) | NW 8 | NW 8 | NW 8 | W 6 | W 6 | W 5 | W 8 | — | — | — | WNW 9 | WNW 9 | — | WNW 10 | WNW 8 | WNW 8 | — | — | — | — | SSE 2 |
| kJ | 646 | 1010 | 602 | 22 | 30 | 41 | 221 | — | — | — | 318 | 408 | — | 631 | 389 | 307 | — | — | — | — | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 394 | 780 | 832 | 122 | 338 | 128 | 140 | 67 | 0 | 35 | 75 | 75 | 35 | 0 | 361 | 388 | 13 | 7 | 0 | 13 | 0 |
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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