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Surf Forecasts:
Trá Na Rosan surfForecast / Donegal / Ireland
16 Day Weather and Surf, issued 11 am Saturday 21 Mar 2026 ISTForecast update in hr min s Forecast update imminent
Trá Na Rosan surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Trá Na Rosan sea temperature is
8.1° C
(Which is slightly cooler than normal)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 Saturday (Mar 21) at 6PM. The primary swell is predicted to be 3.5m and 16s 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 6.5m 15s and forecast to arrive on Wednesday (Mar 25) at 9AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Monday (Mar 23) at 9PM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Sat 21st Mar) | 11ft (3.5m) 16s |
| Best Surf | 6AM (Wed 25th Mar) | 23ft (7.0m) 15s |
| Most Powerful | 9AM (Wed 25th Mar) | 21ft (6.5m) 15s |
Table - best surf conditions forecast for Trá Na Rosan over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range Forecast Light rain (total 5mm), mostly falling on Mon night. Very mild (max 12°C on Mon night, min 6°C on Sun night). Winds increasing (light winds from the WSW on Sat morning, near gales from the SW by Mon night). | Days 3-6 Weather Summary Moderate rain (total 12mm), heaviest on Tue afternoon. Mild temperatures (max 9°C on Thu afternoon, min 5°C on Tue afternoon). Winds decreasing (gales from the WNW on Tue night, light winds from the WSW by Thu morning). | ||||||||||||||||||||
Saturday 21 | Sunday 22 | Monday 23 | Tuesday 24 | Wednesday 25 | Thursday 26 | Friday 27 | |||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | |||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||
| Period(s) (?) | 16 | 16 | 15 | 14 | 14 | 13 | 14 | 14 | 13 | 12 | 17 | 14 | 15 | 14 | 13 | 12 | 11 | 11 | 13 | 16 | 14 |
Wave (?)Graph  | |||||||||||||||||||||
 kJ (?) | 4760 | 5189 | 3390 | 2734 | 5290 | 4228 | 4563 | 3536 | 2496 | 3482 | 18238 | 16577 | 20986 | 12035 | 5680 | 1369 | 900 | 769 | 1672 | 4703 | 2968 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- on | cross- off | cross- on | cross- on | cross- on | cross- off | cross- off | cross- off | cross | cross | cross- on | cross- on | on | on | cross- on | cross- off | cross | on | on | off |
High Tide / height (m) | 7:35PM 3.44 | 7:53AM 3.56 | 8:13PM 3.33 | 8:34AM 3.31 | 8:56PM 3.14 | 9:22AM 2.98 | 9:48PM 2.89 | 10:23AM 2.62 | 11:01PM 2.65 | 11:55AM 2.35 | 12:46AM 2.57 | 1:49PM 2.34 | 2:25AM 2.73 | ||||||||
Low Tide / height (m) | 1:23PM -0.11 | 1:35AM -0.03 | 2:00PM 0.06 | 2:16AM 0.15 | 2:40PM 0.31 | 3:03AM 0.42 | 3:27PM 0.62 | 4:02AM 0.73 | 4:28PM 0.93 | 5:26AM 1.00 | 5:59PM 1.13 | 7:22AM 1.04 | 7:47PM 1.08 | ||||||||
Saturday 21 | Sunday 22 | Monday 23 | Tuesday 24 | Wednesday 25 | Thursday 26 | Friday 27 | |||||||||||||||
| Sunrise | 6:31 | - | - | 6:28 | - | - | 6:26 | - | - | 6:24 | - | - | 6:22 | - | - | 6:18 | - | - | 6:16 | - | - |
| Sunset | - | 6:45 | - | - | 6:46 | - | - | 6:49 | - | - | 6:51 | - | - | 6:52 | - | - | 6:54 | - | - | 6:57 | - |
 | |  |  | | |  | |  | | | | |  |  | | | |  | | | |
Rain (mm) | - | - | - | 1 | - | - | - | - | 4 | - | 2 | 4 | 2 | 1 | 1 | - | - | 2 | - | - | 3 |
| Temp. °C | 10 | 11 | 9 | 8 | 8 | 8 | 8 | 11 | 12 | 8 | 7 | 5 | 6 | 7 | 7 | 7 | 9 | 9 | 8 | 8 | 7 |
| Feels °C (?) | 8 | 8 | 5 | 4 | 0 | 1 | 2 | 3 | 2 | -4 | -5 | -10 | -6 | -3 | -3 | 1 | 4 | 3 | 1 | 4 | 3 |
- Map Icons:
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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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