Downhill Surf Forecast

/ Londonderry (4 surf breaks) /

Ireland (149 surf breaks)

Surf Forecasts:

Downhill surfForecast / Londonderry / Ireland

12 Day Weather and Surf, issued 12 am Sunday 14 Sep 2025 BST

Forecast 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 15.4° C
(Which is 1.5°C warmer than normal for this time of year)

Best Forecast Surf Conditions for Downhill this week:

The surf forecast for Downhill over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 16) at 10PM. The primary swell is predicted to be 0.6m and 10s period with a secondary swell of 0.5m and 6s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Downhill in the next 12 days are 1.5m 16s and forecast to arrive on Wednesday (Sep 17) at 7PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Sunday (Sep 14) at 7PM.

Wave Type	Time (BST) & Date	Wave Height & Period
Next good surf (1 star+)	10PM (Tue 16th Sep)	2ft (0.6m) 10s
Best Surf	4PM (Fri 19th Sep)	5ft (1.6m) 10s
Most Powerful	7PM (Wed 17th Sep)	5ft (1.5m) 16s

Table - best surf conditions forecast for Downhill over the next 12 days.

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Short Range Forecast Heavy rain (total 28mm), heaviest during Sun afternoon. Very mild (max 15°C on Mon morning, min 11°C on Sat night). Mainly strong winds.										Days 3-6 Weather Summary Light rain (total 9mm), mostly falling on Tue night. Very mild (max 16°C on Wed morning, min 11°C on Tue night). Winds decreasing (strong winds from the SW on Wed night, light winds from the N by Fri morning).
		Sunday 14			Monday 15			Tuesday 16			Wednesday 17			Thursday 18			Friday 19			Sat 20
	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM
Rating (10 max)	1	0	0	0	0	0	0	0	0	1	0	0	0	0	0	0	2	2	0	0	0
Swell Height Map See all maps
Wave Height (m) & direction (?)	NW	NW	WNW	WNW	WNW	WNW	WNW	WNW	NW	WNW	NNW	WNW	WNW	WNW	WNW	WNW	NW	NNW	NNW	NNW	NNW
Period(s) (?)	12	11	10	10	14	13	13	12	6	10	9	16	14	12	12	10	10	10	11	10	8
Wave Graph (?)
kJ (?)	314	172	72	36	69	139	563	109	66	55	33	229	834	466	421	651	622	480	234	72	28
Wind (km/h)	SW	SSE	SE	S	W	WNW	WNW	W	W	SSE	S	SSW	SW	SW	WSW	WSW	NNW	ENE	ESE	ESE	SW
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross	cross- off	off	cross- off	cross- on	on	cross- on	cross- on	cross- on	off	cross- off	cross- off	cross	cross	cross- on	cross- on	cross- on	cross- off	off	off	cross
High Tide / height (m)	11:01PM 1.72	11:30AM 1.67		12:20AM 1.47		1:17PM 1.56	2:36AM 1.38		3:21PM 1.65		4:10AM 1.48	4:33PM 1.85		5:03AM 1.62	5:22PM 2.03		5:42AM 1.75	6:00PM 2.17		6:15AM 1.86	6:32PM 2.26
Low Tide / height (m)		5:14AM 0.60	6:04PM 0.65		6:35AM 0.77		8:07PM 0.75	8:33AM 0.79		10:04PM 0.65	10:05AM 0.64		11:08PM 0.48	11:01AM 0.45		11:51PM 0.32	11:41AM 0.27		12:24AM 0.21	12:16PM 0.14

		Sunday 14			Monday 15			Tuesday 16			Wednesday 17			Thursday 18			Friday 19			Sat 20
Sunrise	-	6:56	-	-	6:58	-	-	7:00	-	-	7:01	-	-	7:03	-	-	7:05	-	-	7:07	-
Sunset	-	-	7:47	-	-	7:45	-	-	7:43	-	-	7:39	-	-	7:37	-	-	7:35	-	-	7:31

Rain (mm)	1	2	11	4	2	2	3	2	1	4	2	2	-	-	-	1	-	-	4	3	1
Temp. °C	12	11	13	13	15	14	13	14	14	13	16	15	14	16	16	13	13	13	13	15	16
Feels °C (?)	10	6	9	9	9	8	6	8	8	6	12	8	6	10	10	9	11	11	6	11	14

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Recent Eyeball Surf Reports for Londonderry

Wind Update The wind is still cross-off at Downhill (light winds from the SSW at Magilligan Number 2 7 km from Downhill). 1.5m 12s groundswell from the NW to make surfable waves.
1 hour 4 minutes ago Downhill

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1 h 4 min ago

11 km/h

SSW

Cross-Off

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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.

Information about the Downhill Surf forecast

The above surf forecast table for Downhill provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Downhill can be found by selecting the local surf guide option on the grey menu. Our Downhill 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 (Downhill) 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 Downhill 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 Downhill, camping, hotels and holiday cottages in Londonderry, consider staying in Coleraine which is 11 km (7 miles) away. Other places in and around Londonderry where you can find information about places to rent, and car hire include Derry which is 36 km (22 miles) away, Londonderry County Borough, Ballycastle and Derry.