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Surf Forecasts:
Downhill surfForecast / Londonderry / Ireland
48hr Weather and Surf, issued 6 am Monday 20 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
9.1° C
(Which is normal for this time of year)How big are the waves at Downhill today?
The current surf forecast for Downhill at 11AM is: 0.9m 11s primary swell from a Northwest direction and 0.2m 16s secondary swell from a West-northwest direction (forecast issued at 06:00am April 20). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Apr) | 3ft (0.9m) | 11s |
| Afternoon (20 Apr) | 2.5ft (0.7m) | 11s |
| Evening (20 Apr) | 2ft (0.6m) | 14s |
Table - waves today at Downhill. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 20 | Tuesday 21 | Wednesday 22 | Thu 23 | |||||||||||||||||||||
| 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 | 10 PM | 1 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 12 | 12 | 11 | 11 | 11 | 14 | 14 | 13 | 13 | 16 | 15 | 14 | 14 | 13 | 13 | 13 | 12 | 12 | 11 | 11 | 11 | 11 | 10 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 200 | 228 | 205 | 142 | 92 | 164 | 127 | 120 | 109 | 159 | 224 | 248 | 224 | 176 | 138 | 103 | 72 | 50 | 33 | 19 | 18 | 11 | 4 | 4 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | cross- on | cross- on | cross- on | cross | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | off | off | cross- off | off |
High Tide / height (m) | 8:45AM 2.17 | 9:05PM 2.15 | 9:30AM 1.96 | 9:53PM 2.03 | 10:22AM 1.71 | 10:53PM 1.88 | ||||||||||||||||||
Low Tide / height (m) | 2:54PM 0.16 | 3:22AM 0.18 | 3:37PM 0.32 | 4:20AM 0.37 | 4:29PM 0.48 | |||||||||||||||||||
Monday 20 | Tuesday 21 | Wednesday 22 | Thu 23 | |||||||||||||||||||||
| Sunrise | - | 6:13 | - | - | - | - | - | - | - | 6:09 | - | - | - | - | - | - | - | 6:07 | - | - | - | - | - | - |
| Sunset | - | - | - | - | - | 8:39 | - | - | - | - | - | - | - | 8:42 | - | - | - | - | - | - | - | 8:44 | - | - |
 |  | | | | |  | | | | | | |  | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 7 | 7 | 8 | 8 | 9 | 9 | 9 | 7 | 6 | 5 | 7 | 10 | 12 | 11 | 9 | 6 | 5 | 6 | 8 | 10 | 11 | 11 | 11 | 8 |
| Feels °C (?) | 4 | 4 | 4 | 5 | 5 | 5 | 6 | 2 | 0 | -1 | 1 | 2 | 5 | 6 | 3 | -1 | -2 | -1 | 1 | 3 | 5 | 7 | 8 | 4 |
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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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