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Surf Forecasts:
Trá Na Rosan surfForecast / Donegal / Ireland
12 Day Weather and Surf, issued 6 pm Monday 15 Sep 2025 IST
Best Forecast Surf Conditions for Trá Na Rosan this week:
The surf forecast for Trá Na Rosan over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 16) at 10PM. The primary swell is predicted to be 1.4m and 10s period with a secondary swell of 0.3m and 9s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Trá Na Rosan in the next 12 days are 3.5m 15s and forecast to arrive on Wednesday (Sep 17) at 7PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.5m 13s period and expected on Wednesday (Sep 17) at 4PM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Tue 16th Sep) | 4.5ft (1.4m) 10s |
| Best Surf | 1PM (Thu 18th Sep) | 6.5ft (2.0m) 11s |
| Most Powerful | 7PM (Wed 17th Sep) | 11ft (3.5m) 15s |
Table - best surf conditions forecast for Trá Na Rosan over the next 12 days.
Short Range Forecast Heavy rain (total 22mm), heaviest during Tue night. Very mild (max 16°C on Thu morning, min 11°C on Tue night). Mainly strong winds. | Days 3-6 Weather Summary Moderate rain (total 10mm), heaviest on Thu night. Very mild (max 17°C on Fri afternoon, min 10°C on Sat night). Winds increasing (light winds from the ESE on Thu afternoon, gales from the NNW by Sat afternoon). | ||||||||||||||||||||||
Mon 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | |||||||||||||||||
| PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |||
Rating (10 max) | |||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||||
| Period(s) (?) | 13 | 13 | 12 | 11 | 10 | 9 | 9 | 14 | 12 | 10 | 13 | 12 | 11 | 10 | 9 | 9 | 8 | 7 | 9 | 12 | 11 | ||
Wave (?)Graph  | |||||||||||||||||||||||
| Energy (?) | 2800 | 2115 | 1243 | 702 | 267 | 107 | 25 | 4431 | 1473 | 637 | 728 | 541 | 308 | 133 | 1115 | 1331 | 471 | 591 | 1494 | 2791 | 1013 | ||
Wind (km/h) | |||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross- on | cross- on | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | on | on | on | on | on | on | on | ||
High Tide / height (m) | 2:00AM 2.33 | 2:46PM 2.60 | 3:39AM 2.43 | 4:07PM 2.83 | 4:43AM 2.64 | 5:02PM 3.09 | 5:28AM 2.85 | 5:44PM 3.31 | 6:05AM 3.02 | 6:19PM 3.46 | 6:38AM 3.15 | 6:51PM 3.53 | 7:07AM 3.23 | ||||||||||
Low Tide / height (m) | 7:27PM 1.07 | 8:04AM 1.15 | 9:18PM 0.99 | 9:37AM 0.99 | 10:31PM 0.75 | 10:38AM 0.74 | 11:19PM 0.51 | 11:22AM 0.49 | 11:57PM 0.31 | 11:58AM 0.29 | 12:29AM 0.17 | 12:31PM 0.16 | 12:59AM 0.09 | ||||||||||
Mon 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | |||||||||||||||||
| Sunrise | - | - | 7:03 | - | - | 7:05 | - | - | 7:07 | - | - | 7:09 | - | - | 7:11 | - | - | 7:13 | - | - | 7:15 | ||
| Sunset | 7:49 | - | - | 7:46 | - | - | 7:44 | - | - | 7:42 | - | - | 7:38 | - | - | 7:36 | - | - | 7:34 | - | - | ||
 |  |  |  |  | | |  |  |  |  | | | | | | | | |  | | |||
Rain (mm) | 3 | 8 | - | - | 11 | - | - | - | - | 1 | 2 | - | - | - | 1 | 1 | 4 | 1 | - | - | - | ||
| Temp. °C | 14 | 14 | 14 | 14 | 13 | 15 | 15 | 14 | 16 | 15 | 16 | 15 | 17 | 14 | 11 | 11 | 11 | 11 | 12 | 11 | 11 | ||
| Feels °C (?) | 6 | 7 | 8 | 10 | 10 | 10 | 6 | 5 | 13 | 14 | 13 | 12 | 12 | 9 | -1 | -3 | 0 | 1 | 2 | 1 | 5 | ||
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for Donegal
The cross-on wind has turned onshore at Ballyhiernan Bay (strong winds from the NW at Malin Head 27 km from Ballyhiernan Bay). No surfable waves
35 km away, 51 min ago
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 12 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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