Surf Forecasts:
How big are the waves at Portstewart Strand today (20 Sep):
- Afternoon surf: Afternoon surf (20 Sep, local time) - 6ft (1.8m), 11s period with NW swell.
- Evening surf: Evening surf (20 Sep, local time) - 5ft (1.6m), 11s period with NW swell.
The current surf forecast for Portstewart Strand at 10PM is: 1.6m 12s primary swell from a Northwest direction (forecast issued at 06:00pm September 20). The wind direction is predicted to be offshore and the swell rating is 3.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Sep) | - | - |
| Afternoon (20 Sep) | 6ft (1.8m) | 11s |
| Evening (20 Sep) | 5ft (1.6m) | 11s |
Table - waves today at Portstewart Strand. (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 11mm), heaviest on Tue afternoon. Warm (max 22°C on Mon afternoon, min 11°C on Tue afternoon). Wind will be generally light. | |||||||||||||||||||
Sun 20 | Monday 21 | Tuesday 22 | |||||||||||||||||
4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||
Wave Height (m) Direction Period (s) | NW 11 | NW 11 | NW 12 | NW 13 | NW 12 | NW 12 | NW 12 | NW 12 | NW 11 | NW 11 | NW 11 | NW 11 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | NW 18 | NW 15 | NW 15 |
Wave Graph  | |||||||||||||||||||
 kJ | 671 | 564 | 638 | 653 | 481 | 282 | 309 | 224 | 179 | 140 | 117 | 115 | 92 | 92 | 121 | 90 | 57 | 223 | 424 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | off | cross-off | cross-off | cross-off | cross | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | on | glassy | on | cross-on | glassy |
High Tide | 3:29PM1.15m | 3:56AM1.03m | 4:25PM1.30m | 4:33AM1.16m | 4:57PM1.46m | ||||||||||||||
Low Tide | 9:57PM0.75m | 9:43AM0.65m | 10:51PM0.62m | 10:35AM0.50m | |||||||||||||||
 |  |  | | | | |  | | |  | | | | | |  | |  | |
 | — | — | — | — | — | 7:09 | — | — | — | — | — | — | — | 7:11 | — | — | — | — | — |
 | — | 7:31 | — | — | — | — | — | — | — | 7:29 | — | — | — | — | — | — | — | 7:27 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 4 | 1 |
Temp °C | 14 | 13 | 13 | 13 | 14 | 14 | 16 | 19 | 22 | 21 | 18 | 17 | 17 | 16 | 13 | 13 | 13 | 11 | 11 |
Feels °C | 10 | 10 | 10 | 8 | 9 | 11 | 15 | 18 | 21 | 21 | 16 | 15 | 15 | 13 | 11 | 13 | 12 | 9 | 10 |
Swell 1 Height (m) Direction Period (s) | NW 11 | NW 11 | NW 12 | NW 13 | NW 12 | NW 12 | NW 12 | NW 12 | NW 11 | NW 11 | NW 11 | NW 11 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | NW 15 | NW 15 |
| kJ | 671 | 564 | 638 | 653 | 481 | 282 | 309 | 224 | 179 | 140 | 117 | 115 | 92 | 92 | 121 | 90 | 57 | 223 | 424 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | NNW 8 | NNW 7 | — | — | — | — | — | — | — | NW 12 | — | NW 19 | NW 18 | WNW 9 | WNW 9 |
| kJ | — | — | — | — | 7 | 26 | — | — | — | — | — | — | — | 6 | — | 15 | 49 | 32 | 32 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NW 15 | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 8 | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 163 | 7 | 0 | 2 | 2 | 2 | 2 | 0 | 2 | 0 | 0 | 0 | 2 | 2 | 7 | 0 | 116 | 69 | 0 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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 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.
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