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Portstewart Strand Surf Forecast
/ Londonderry (4 surf breaks) /
Portstewart Strand surfForecast / Londonderry / Ireland
12 Day Weather and Surf, issued 6 am Wednesday 25 Jun 2025 BST
Best Forecast Surf Conditions for Portstewart Strand this week:
The surf forecast for Portstewart Strand over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Jun 27) at 10PM. The primary swell is predicted to be 0.8m and 10s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Portstewart Strand in the next 12 days are 1.1m 12s and forecast to arrive on Saturday (Jun 28) 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 0.4m 3s period and expected on Friday (Jun 27) at 7AM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Fri 27th Jun) | 2.5ft (0.8m) 10s |
| Best Surf | 1AM (Sun 29th Jun) | 3.5ft (1.1m) 11s |
| Most Powerful | 7PM (Sat 28th Jun) | 3.5ft (1.1m) 12s |
Table - best surf conditions forecast for Portstewart Strand over the next 12 days.
Wednesday 25 | Thursday 26 | Friday 27 | Saturday 28 | Sunday 29 | Monday 30 | Tuesday 01 | Wednesday 02 | Thursday 03 | Friday 04 | Saturday 05 | Sunday 06 | |||||||||||||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | 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) (?) | 9 | 9 | 9 | 10 | 10 | 10 | 11 | 11 | 10 | 9 | 9 | 11 | 10 | 10 | 10 | 10 | 9 | 9 | 8 | 7 | 8 | 7 | 7 | 7 | 8 | 7 | 7 | 6 | 11 | 10 | 10 | 10 | 9 | 9 | 10 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||||||||||||||
| Energy (?) | 57 | 37 | 34 | 56 | 88 | 160 | 149 | 99 | 116 | 97 | 163 | 288 | 227 | 160 | 102 | 68 | 54 | 55 | 179 | 79 | 31 | 38 | 68 | 54 | 35 | 26 | 11 | 4 | 35 | 133 | 85 | 51 | 49 | 34 | 56 | 37 |
Wind (km/h) | ||||||||||||||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | cross- on | cross- on | cross- off | cross- off | cross- off | cross- off | cross | cross- on | cross- off | cross- off | cross- off | cross- off | cross- on | on | cross- off | cross | cross- on | glass | glass | cross- on | cross- on | cross- on | cross- on | cross- off | cross | glass | cross | cross | cross- on | cross- on | cross- on | cross- on | glass |
High Tide / height (m) | 6:58PM 1.84 | 7:19AM 1.61 | 7:44PM 1.89 | 8:02AM 1.55 | 8:29PM 1.90 | 8:42AM 1.47 | 9:15PM 1.85 | 9:21AM 1.39 | 10:00PM 1.77 | 10:01AM 1.30 | 10:45PM 1.66 | 10:43AM 1.22 | 11:32PM 1.54 | 11:32AM 1.15 | 12:24AM 1.42 | 12:38PM 1.11 | 1:26AM 1.32 | 2:04PM 1.11 | 2:37AM 1.27 | 3:22PM 1.17 | 3:42AM 1.27 | 4:21PM 1.27 | ||||||||||||||
Low Tide / height (m) | 12:53PM 0.18 | 1:35AM 0.15 | 1:36PM 0.15 | 2:25AM 0.17 | 2:18PM 0.14 | 3:12AM 0.23 | 2:58PM 0.15 | 3:59AM 0.31 | 3:39PM 0.19 | 4:44AM 0.41 | 4:21PM 0.26 | 5:30AM 0.50 | 5:05PM 0.36 | 6:17AM 0.56 | 5:54PM 0.47 | 7:08AM 0.61 | 6:52PM 0.56 | 8:04AM 0.62 | 8:02PM 0.63 | 9:05AM 0.61 | 9:21PM 0.64 | 10:05AM 0.57 | 10:33PM 0.60 | |||||||||||||
Wednesday 25 | Thursday 26 | Friday 27 | Saturday 28 | Sunday 29 | Monday 30 | Tuesday 01 | Wednesday 02 | Thursday 03 | Friday 04 | Saturday 05 | Sunday 06 | |||||||||||||||||||||||||
| Sunrise | 4:47 | - | - | 4:47 | - | - | 4:48 | - | - | 4:48 | - | - | 4:48 | - | - | 4:50 | - | - | 4:50 | - | - | 4:50 | - | - | 4:52 | - | - | 4:52 | - | - | 4:54 | - | - | 4:54 | - | - |
| Sunset | - | 10:10 | - | - | 10:10 | - | - | 10:10 | - | - | 10:10 | - | - | 10:09 | - | - | 10:09 | - | - | 10:09 | - | - | 10:08 | - | - | 10:08 | - | - | 10:07 | - | - | 10:07 | - | - | 10:07 | - |
 | |  | | |  |  | | | |  |  | |  |  | | |  | |  | |  | | | | | | | | | | | | | | | |
Rain (mm) | - | - | 1 | - | - | - | 1 | 1 | 1 | - | - | - | - | 1 | 1 | - | - | - | - | 4 | - | - | - | - | - | - | - | - | 1 | 3 | 1 | - | - | - | - | - |
| Temp. °C | 17 | 18 | 15 | 15 | 16 | 14 | 17 | 19 | 19 | 18 | 17 | 15 | 22 | 23 | 21 | 13 | 14 | 13 | 16 | 15 | 13 | 14 | 14 | 13 | 15 | 15 | 14 | 17 | 18 | 15 | 15 | 15 | 14 | 16 | 17 | 17 |
| Feels °C (?) | 15 | 15 | 14 | 10 | 10 | 10 | 14 | 16 | 18 | 14 | 12 | 14 | 19 | 21 | 21 | 8 | 11 | 12 | 14 | 13 | 12 | 12 | 11 | 11 | 13 | 12 | 13 | 15 | 18 | 12 | 11 | 12 | 12 | 16 | 17 | 18 |
Short Range Forecast: Light rain (total 4mm), mostly falling on Wed night. Very mild (max 19°C on Fri afternoon, min 12°C on Thu morning). Mainly fresh winds. | Days 3-6 Weather Summary Light rain (total 2mm), mostly falling on Sun afternoon. Warm (max 23°C on Sun afternoon, min 11°C on Mon night). Winds increasing (calm on Sat night, strong winds from the WSW by Sun night). | Days 6-9 Weather Summary Light rain (total 4mm), mostly falling on Tue afternoon. Very mild (max 16°C on Tue morning, min 11°C on Tue night). Wind will be generally light. | Long Range Forecast: Light rain (total 6mm), mostly falling on Fri night. Very mild (max 18°C on Fri afternoon, min 14°C on Fri night). Wind will be generally light. | |||||||||||||||||||||||||||||||||
- Map Icons:
Break
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 Portstewart Strand 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 Portstewart Strand Surf forecast
The above surf forecast table for Portstewart Strand provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Portstewart Strand can be found by selecting the local surf guide option on the grey menu. Our Portstewart Strand 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 (Portstewart Strand) 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 Portstewart Strand 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 Londonderry? If you are looking for accommodation near Portstewart Strand, camping, hotels and holiday cottages in Londonderry, consider staying in Coleraine which is 6 km (4 miles) away. Other places in and around Londonderry where you can find information about places to rent, and car hire include Ballycastle which is 32 km (20 miles) away, Ballypatrick, Derry and Londonderry County Borough.
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