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Surf Forecasts:
Downhill surfForecast / Londonderry / Ireland
48hr Weather and Surf, issued 12 am Saturday 18 Apr 2026 BSTForecast update in hr min s Forecast update imminent
Downhill surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Downhill sea temperature is
8.8° C
(Which is normal for this time of year)How big are the waves at Downhill today?
The current surf forecast for Downhill at 3AM is: 0.5m 9s primary swell from a West-northwest direction and 0.2m 13s secondary swell from a West-northwest direction, 0.4m 3s secondary swell from a West-southwest direction (forecast issued at 12:00am April 18). The wind direction is predicted to be cross-shore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Apr) | 4.5ft (1.4m) | 9s |
| Afternoon (18 Apr) | 5ft (1.6m) | 10s |
| Evening (18 Apr) | 5ft (1.6m) | 9s |
Table - waves today at Downhill. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 18 | Sunday 19 | Monday 20 | ||||||||||||||||||||||
| 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 | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |  |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 11 | 10 | 9 | 9 | 9 | 9 | 10 | 10 | 9 | 9 | 9 | 9 | 8 | 8 | 15 | 13 | 13 | 12 | 12 | 12 | 11 | 11 | 11 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 62 | 54 | 64 | 227 | 330 | 396 | 489 | 479 | 382 | 300 | 294 | 231 | 166 | 135 | 117 | 144 | 199 | 146 | 200 | 164 | 145 | 116 | 71 | 120 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross | cross- on | cross- on | on | on | on | on | cross- on | cross- on | cross | cross | cross- on | cross- on | cross- on | cross | cross | glass | cross- on | glass | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 7:06PM 2.16 | 7:23AM 2.39 | 7:43PM 2.22 | 8:03AM 2.32 | 8:22PM 2.22 | 8:45AM 2.17 | ||||||||||||||||||
Low Tide / height (m) | 1:10AM -0.03 | 1:39PM -0.04 | 1:50AM -0.03 | 2:15PM 0.03 | 2:34AM 0.04 | 2:54PM 0.16 | ||||||||||||||||||
Saturday 18 | Sunday 19 | Monday 20 | ||||||||||||||||||||||
| Sunrise | - | - | - | 6:16 | - | - | - | - | - | - | - | 6:15 | - | - | - | - | - | - | - | 6:13 | - | - | - | - |
| Sunset | - | - | - | - | - | - | - | 8:36 | - | - | - | - | - | - | - | 8:37 | - | - | - | - | - | - | - | 8:39 |
 |  |  |  |  | | | | | | |  |  | | | | | | | | | | | | |
Rain (mm) | - | - | - | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 9 | 9 | 9 | 8 | 8 | 9 | 9 | 9 | 8 | 7 | 7 | 7 | 8 | 9 | 9 | 8 | 8 | 7 | 7 | 7 | 8 | 9 | 10 | 11 |
| Feels °C (?) | 3 | 3 | 3 | 1 | 0 | 2 | 2 | 4 | 4 | 3 | 3 | 3 | 5 | 6 | 5 | 4 | 5 | 5 | 5 | 5 | 4 | 3 | 5 | 6 |
- 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 Downhill 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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