Buy Less, Surf More This Black Friday
Surf-forecast is providing a free, all-access pass to our premium features and 12-day forecasts all weekend.
Surf Forecasts:
Downhill surfForecast / Londonderry / Ireland
48hr Weather and Surf, issued 5 pm Tuesday 09 Dec 2025 GMTForecast 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
10.8° C
(Which is slightly warmer than usual)How big are the waves at Downhill today?
The current surf forecast for Downhill at 1AM is: 2.1m 14s primary swell from a West-northwest direction and 1.1m 4s secondary swell from a Southwest direction (forecast issued at 05:00pm December 09). An open ocean swell of 0.3m 5s is not directed at the surf break. The wind direction is predicted to be cross-shore.
| Time (GMT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (10 Dec) | 5.5ft (1.7m) | 12s |
| Afternoon (10 Dec) | 7ft (2.1m) | 13s |
| Evening (10 Dec) | 7ft (2.1m) | 14s |
Table - waves today at Downhill. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tuesday 09 | Wednesday 10 | Thursday 11 | Friday 12 | |||||||||||||||||||||
| 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 16 | 15 | 14 | 14 | 13 | 13 | 12 | 11 | 13 | 13 | 14 | 14 | 14 | 13 | 13 | 14 | 15 | 18 | 17 | 17 | 16 | 17 | 17 | 18 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 306 | 279 | 384 | 1447 | 1444 | 1094 | 822 | 1121 | 1387 | 1521 | 1737 | 1471 | 1133 | 780 | 642 | 460 | 544 | 813 | 1185 | 1524 | 1384 | 1892 | 3087 | 3422 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- on | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 9:25PM 1.59 | 10:03AM 2.00 | 10:22PM 1.44 | 11:08AM 1.86 | 11:33PM 1.34 | |||||||||||||||||||
Low Tide / height (m) | 3:42PM 0.39 | 3:30AM 0.35 | 4:43PM 0.52 | 4:26AM 0.46 | 5:50PM 0.61 | 5:30AM 0.57 | ||||||||||||||||||
Tuesday 09 | Wednesday 10 | Thursday 11 | Friday 12 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | 8:41 | - | - | - | - | - | - | - | 8:41 | - | - | - | - | - | - | - | 8:42 | - |
| Sunset | 3:57 | - | - | - | - | - | - | - | 3:57 | - | - | - | - | - | - | - | 3:57 | - | - | - | - | - | - | - |
 |  | |  |  |  |  |  | | | | | | | | | | | | | | | | | |
Rain (mm) | 1 | 1 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 2 | 4 | - | - | - | - | - |
| Temp. °C | 14 | 11 | 10 | 9 | 10 | 10 | 10 | 10 | 10 | 11 | 11 | 10 | 9 | 10 | 10 | 11 | 9 | 8 | 7 | 7 | 7 | 6 | 5 | 7 |
| Feels °C (?) | 3 | -2 | -1 | -1 | 0 | 0 | 1 | 0 | 1 | 3 | 4 | 2 | 2 | 3 | 1 | 4 | 3 | 5 | 3 | 3 | 2 | 1 | -1 | 0 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Latest Updates
Quiksilver Teams Up With PrimaLoft® For World’s First Thermal Layering System for a Wetsuit.
Previously used in our snow jackets for mountain conditions, PrimaLoft® technology is making its debut in the surf industry. The aim is to bring mountain-grade warmth to the waves.
Vancouver Island’s Day Of Days With Reed Platenius
Surf-Forecast recently helped the 21-year-old Canadian pro surfer and adventurer score some cold water perfection at home.
5 Reasons Why Costa Rica Is A Surfer (and Non Surfer) Paradise
With or without a surfboard, Costa Rica is a bucket list destination that has shown what a nation is capable of when nature is put first.
Read more
Discover more articles and updates in the Greenroom.
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.
Nearest