Dipper › Co. Donegal

Portarthur, Derrybeg

Excellent Quality 2025 Green Coast faces NW

🌊 Dip🏄 Surf
Any tidePrefer highPrefer low
Dip score now
42
Blowy · fresh breeze, offshore, flatter inshore
Waves
1.3 m
12 s period from WNW · model cell 2 km out
Sea
15.1°
Grand. M2 buoy, Irish Sea east of Dublin, 259 km away.
Tide
3.4 m
High tide. High at 10:00.
Wind
30 km/h
Fresh breeze, SSE, offshore, gusts 51
Daylight
07:37
Sunrise. Sunset 19:08. Air 13°C.

Best dip each day

Daylight hours, preferring high tide
Today
19:00
Fresh 57/100
gentle breeze, dry, waves 1.2 m · 1.2 m · 19 km/h
▼ 03:35 ▲ 10:00 ▼ 16:10 ▲ 22:35
Sat, 3 Oct
11:00
Decent 66/100
moderate breeze, dry, waves 1.1 m · 1.1 m · 22 km/h
▼ 04:25 ▲ 11:05 ▼ 17:40 ▲ 23:50
Sun, 4 Oct
12:00
Fresh 47/100
fresh breeze, dry, waves 1.2 m · 1.2 m · 34 km/h
▼ 05:40 ▲ 12:40 ▼ 19:25
Mon, 5 Oct
13:00
Blowy 32/100
fresh breeze, rain, waves 1.2 m · 1.2 m · 34 km/h
▲ 01:35 ▼ 07:30 ▲ 14:10 ▼ 21:05
Tue, 6 Oct
16:00
Decent 63/100
gentle breeze, showers possible, waves 1.2 m · 1.2 m · 18 km/h
▲ 03:05 ▼ 09:00 ▲ 15:30 ▼ 22:05
Wed, 7 Oct
19:00
Fresh 50/100
moderate breeze, onshore, choppy, rain · 28 km/h
▲ 04:05 ▼ 09:55 ▲ 16:25 ▼ 22:50
Thu, 8 Oct
13:00
Decent 65/100
gentle breeze, showers possible · 19 km/h
▲ 04:55 ▼ 10:50 ▲ 17:10 ▼ 23:25

Week at a glance

Tap or drag to pick an hour. Everything below follows.
Fri 09:0041 · Blowyfresh breeze · offshore, flatter inshore
Fri 2Sat 3Sun 4Mon 5Tue 6Wed 7Thu 80003060912151821Fri 09:00 · 41 BlowyFri 10:00 · 41 BlowyFri 11:00 · 25 GrimFri 12:00 · 11 GrimFri 13:00 · 4 GrimFri 14:00 · 28 BlowyFri 15:00 · 35 BlowyFri 16:00 · 52 FreshFri 17:00 · 39 BlowyFri 18:00 · 46 FreshFri 19:00 · 57 FreshFri 20:00 · 36 Blowy · nightFri 21:00 · 56 Fresh · nightFri 22:00 · 54 Fresh · nightFri 23:00 · 55 Fresh · nightSat 00:00 · 56 Fresh · nightSat 01:00 · 51 Fresh · nightSat 02:00 · 47 Fresh · nightSat 03:00 · 42 Blowy · nightSat 04:00 · 37 Blowy · nightSat 05:00 · 37 Blowy · nightSat 06:00 · 42 Blowy · nightSat 07:00 · 46 Fresh · nightSat 08:00 · 50 FreshSat 09:00 · 54 FreshSat 10:00 · 61 FreshSat 11:00 · 66 DecentSat 12:00 · 62 DecentSat 13:00 · 58 FreshSat 14:00 · 54 FreshSat 15:00 · 49 FreshSat 16:00 · 45 FreshSat 17:00 · 41 BlowySat 18:00 · 40 BlowySat 19:00 · 54 FreshSat 20:00 · 49 Fresh · nightSat 21:00 · 53 Fresh · nightSat 22:00 · 58 Fresh · nightSat 23:00 · 46 Fresh · nightSun 00:00 · 49 Fresh · nightSun 01:00 · 36 Blowy · nightSun 02:00 · 32 Blowy · nightSun 03:00 · 27 Grim · nightSun 04:00 · 14 Grim · nightSun 05:00 · 9 Grim · nightSun 06:00 · 7 Grim · nightSun 07:00 · 11 Grim · nightSun 08:00 · 23 GrimSun 09:00 · 27 GrimSun 10:00 · 31 BlowySun 11:00 · 35 BlowySun 12:00 · 47 FreshSun 13:00 · 41 BlowySun 14:00 · 36 BlowySun 15:00 · 40 BlowySun 16:00 · 36 BlowySun 17:00 · 32 BlowySun 18:00 · 28 BlowySun 19:00 · 24 GrimSun 20:00 · 25 Grim · nightSun 21:00 · 29 Blowy · nightSun 22:00 · 34 Blowy · nightSun 23:00 · 38 Blowy · nightMon 00:00 · 27 Grim · nightMon 01:00 · 47 Fresh · nightMon 02:00 · 32 Blowy · nightMon 03:00 · 27 Grim · nightMon 04:00 · 39 Blowy · nightMon 05:00 · 18 Grim · nightMon 06:00 · 5 Grim · nightMon 07:00 · 16 Grim · nightMon 10:00 · 20 GrimMon 13:00 · 32 BlowyMon 16:00 · 30 BlowyMon 19:00 · 32 BlowyMon 22:00 · 27 Grim · nightTue 01:00 · 41 Blowy · nightTue 04:00 · 47 Fresh · nightTue 07:00 · 41 Blowy · nightTue 10:00 · 41 BlowyTue 13:00 · 54 FreshTue 16:00 · 63 DecentTue 19:00 · 50 FreshTue 22:00 · 37 Blowy · nightWed 01:00 · 51 Fresh · nightWed 04:00 · 83 Grand · nightWed 07:00 · 69 Decent · nightWed 10:00 · 36 BlowyWed 13:00 · 48 FreshWed 19:00 · 50 FreshThu 01:00 · 29 Blowy · nightThu 07:00 · 69 Decent · nightThu 13:00 · 65 DecentThu 19:00 · 55 Fresh

Fri, 2 Oct, 09:00

41 Blowy
  • fresh breeze
  • offshore, flatter inshore
  • showers possible
  • waves 1.3 m
  • high tide
  • offshore wind
NESWsunrisesunset1.3 m30 km/h
faces 319° NW · wind offshore
Waves
1.3 m @ 12 s from WNW
Wind
30 km/h SSE · gusts 51
Tide
3.3 m · high
Air
13°C · 0.4 mm rain

Meteogram

Score, waves, wind (green offshore, amber cross, red onshore), rain and air, tide

Hour by hour

Next 48 hours
TimeDipWavesPeriodFromWindGustTideRainAirWhy
Today
09:0041 Blowy1.3 m (1.2 swell)12 sWNW30 km/h SSE513.3 m ▲0.4 mm13°fresh breeze, offshore, flatter inshore, showers possible
10:0041 Blowy1.3 m (1.1 swell)12 sWNW31 km/h S533.5 m ▲0.8 mm13°fresh breeze, offshore, flatter inshore, rain
11:0025 Grim1.3 m (1.1 swell)12 sWNW32 km/h S563.4 m ▲1.4 mm13°fresh breeze, offshore, flatter inshore, rain
12:0011 Grim1.3 m (1.1 swell)12 sWNW29 km/h S593.0 m 3.0 mm13°fresh breeze, offshore, flatter inshore, rain
13:004 Grim1.2 m (1.1 swell)11 sWNW33 km/h SSW582.4 m 2.4 mm14°fresh breeze, rain, waves 1.2 m
14:0028 Blowy1.2 m (1.1 swell)11 sWNW23 km/h SSW521.8 m 1.1 mm13°moderate breeze, rain, waves 1.2 m
15:0035 Blowy1.2 m (1.0 swell)11 sWNW27 km/h SSW491.4 m ▼0.4 mm13°moderate breeze, showers possible, waves 1.2 m
16:0052 Fresh1.2 m (1.0 swell)11 sWNW12 km/h W451.2 m ▼0.1 mm13°light winds, dry, waves 1.2 m
17:0039 Blowy1.2 m (1.0 swell)11 sWNW21 km/h WSW471.2 m ▼dry13°moderate breeze, dry, waves 1.2 m
18:0046 Fresh1.2 m (1.0 swell)11 sWNW26 km/h WSW491.5 m dry13°moderate breeze, dry, waves 1.2 m
19:0057 Fresh1.2 m (1.0 swell)11 sWNW19 km/h W471.9 m dry12°gentle breeze, dry, waves 1.2 m
20:0036 Blowy1.2 m (1.0 swell)11 sNW29 km/h W442.5 m dry12°fresh breeze, dry, waves 1.2 m
21:0056 Fresh1.2 m (1.0 swell)11 sNW25 km/h W432.9 m dry12°moderate breeze, dry, waves 1.2 m
22:0054 Fresh1.2 m (1.0 swell)11 sNW28 km/h W423.1 m ▲dry12°moderate breeze, onshore, choppy, dry
23:0055 Fresh1.2 m (1.0 swell)11 sNW27 km/h W403.2 m ▲dry12°moderate breeze, onshore, choppy, dry
Saturday, 3 October
00:0056 Fresh1.2 m (0.9 swell)11 sNW26 km/h W393.0 m dry12°moderate breeze, dry, waves 1.2 m
01:0051 Fresh1.2 m (0.9 swell)11 sNW24 km/h W372.6 m dry12°moderate breeze, dry, waves 1.2 m
02:0047 Fresh1.2 m (0.9 swell)11 sNW24 km/h WSW362.1 m dry12°moderate breeze, dry, waves 1.2 m
03:0042 Blowy1.2 m (0.9 swell)11 sNW23 km/h WSW351.6 m dry12°moderate breeze, dry, waves 1.2 m
04:0037 Blowy1.2 m (0.9 swell)11 sNW24 km/h WSW361.3 m ▼dry13°moderate breeze, dry, waves 1.2 m
05:0037 Blowy1.2 m (0.9 swell)11 sNW24 km/h WSW381.3 m ▼dry12°moderate breeze, dry, waves 1.2 m
06:0042 Blowy1.2 m (0.8 swell)11 sNW24 km/h WSW391.5 m 0.1 mm12°moderate breeze, dry, waves 1.2 m
07:0046 Fresh1.2 m (0.8 swell)10 sNW25 km/h WSW391.9 m dry13°moderate breeze, dry, waves 1.2 m
08:0050 Fresh1.1 m (0.8 swell)10 sNW23 km/h WSW362.4 m dry13°moderate breeze, dry, waves 1.2 m
09:0054 Fresh1.1 m (0.8 swell)10 sNW21 km/h WSW332.8 m dry13°moderate breeze, dry, waves 1.1 m
10:0061 Fresh1.1 m (0.8 swell)10 sNW23 km/h WSW333.1 m ▲dry14°moderate breeze, dry, waves 1.1 m
11:0066 Decent1.1 m (0.7 swell)10 sNW22 km/h WSW343.3 m ▲dry14°moderate breeze, dry, waves 1.1 m
12:0062 Decent1.1 m (0.7 swell)10 sNW22 km/h SW363.2 m ▲dry14°moderate breeze, dry, waves 1.1 m
13:0058 Fresh1.1 m (0.7 swell)10 sWNW24 km/h SW373.0 m dry14°moderate breeze, dry, waves 1.1 m
14:0054 Fresh1.1 m (0.7 swell)10 sWNW25 km/h SW392.5 m dry14°moderate breeze, dry, waves 1.1 m
15:0049 Fresh1.1 m (0.7 swell)10 sWNW25 km/h SW402.1 m dry15°moderate breeze, dry, waves 1.1 m
16:0045 Fresh1.1 m (0.7 swell)10 sWNW24 km/h SW401.7 m dry15°moderate breeze, dry, waves 1.1 m
17:0041 Blowy1.1 m (0.7 swell)10 sWNW21 km/h SSW401.5 m ▼dry15°moderate breeze, dry, waves 1.1 m
18:0040 Blowy1.1 m (0.7 swell)10 sWNW21 km/h SSW401.4 m ▼dry14°moderate breeze, dry, waves 1.1 m
19:0054 Fresh1.1 m (0.7 swell)10 sWNW19 km/h SSW411.6 m dry14°gentle breeze, dry, waves 1.1 m
20:0049 Fresh1.1 m (0.8 swell)10 sWNW26 km/h SSW441.9 m dry14°moderate breeze, dry, waves 1.1 m
21:0053 Fresh1.1 m (0.8 swell)10 sWNW27 km/h SSW482.2 m dry14°moderate breeze, dry, waves 1.1 m
22:0058 Fresh1.2 m (0.8 swell)10 sWNW27 km/h SSW502.6 m dry13°moderate breeze, dry, waves 1.2 m
23:0046 Fresh1.2 m (0.8 swell)10 sWNW30 km/h S522.8 m ▲dry14°fresh breeze, dry, waves 1.2 m
Sunday, 4 October
00:0049 Fresh1.2 m (0.8 swell)10 sWNW30 km/h S542.9 m ▲0.1 mm14°fresh breeze, dry, waves 1.2 m
01:0036 Blowy1.2 m (0.8 swell)10 sWNW31 km/h SSW552.9 m 0.1 mm14°fresh breeze, dry, waves 1.2 m
02:0032 Blowy1.2 m (0.8 swell)10 sWNW32 km/h S562.6 m 0.1 mm14°fresh breeze, dry, waves 1.2 m
03:0027 Grim1.2 m (0.8 swell)10 sWNW33 km/h SSW572.2 m 0.1 mm14°fresh breeze, dry, waves 1.2 m
04:0014 Grim1.2 m (0.8 swell)10 sWNW33 km/h SSW571.8 m 0.2 mm15°fresh breeze, showers possible, waves 1.2 m
05:009 Grim1.2 m (0.8 swell)10 sWNW35 km/h SSW571.6 m ▼0.2 mm15°fresh breeze, showers possible, waves 1.2 m
06:007 Grim1.2 m (0.8 swell)10 sWNW32 km/h SSW571.5 m ▼0.2 mm15°fresh breeze, showers possible, waves 1.2 m
07:0011 Grim1.2 m (0.8 swell)10 sWNW32 km/h SSW561.6 m ▼0.2 mm15°fresh breeze, showers possible, waves 1.2 m
08:0023 Grim1.2 m (0.8 swell)10 sWNW35 km/h SW481.9 m 0.1 mm15°fresh breeze, showers possible, waves 1.2 m

Where the energy comes from

Wave energy (H²·T) this week by direction, against the swell window

Swell arriving between W and NE reaches this spot; anything else is blocked by land and counts for much less.

Tide today

Aranmore, 17 km away · metres above chart datum
03:3510:0016:1022:35
Low 03:35 · 1.0 mHigh 10:00 · 3.5 mLow 16:10 · 1.2 mHigh 22:35 · 3.2 m

The spot

Faces
319° NW
Swell window
W 280° → NE 50°
Exposure
Open coast · model cell 2 km out
Water
Excellent Quality

Facing and swell window are derived from the wave model's coastline around the spot, not surveyed. Know better? Tell us.

Water quality

Recent grades: 2024 Excellent, 2023 Excellent, 2022 Good. The EPA flags a short-term pollution risk here after heavy rain.

Beach profile (PDF) · beaches.ie

On the ground

No lifeguard listedNo toiletsParkingAccessible: YesDogs on lead

As listed by Donegal County Council. Open in Maps.

Sauna after?

Wild Atlantic Sea Sauna Dooey Beach · Dooey Beach, Lettermacaward · 25 km · fixed

Cocoon Sauna · Portnablagh Pier, Dunfanaghy · 26 km · fixed

itSaunatrailer · The Wee Beach, Marble Hill, Dunfanaghy · 28 km · fixed

Portarthur beach is a north facing, long sandy beach; confined by a rocky outcrop east of Inishmeane Island to the North and a small estuary to the south. Fixed dunes are frequent throughout the site. They support a wide variety of plant species including some rare plant forms. There are also a wide range of bird species. Portarthur is situated in a Gaeltacht area with a variety of islands off the coast. Activities at Portarthur beach include swimming, kayaking, boating, sailing, power boating, jet skiing, diving and other land based activities on the beach. The designated bathing area is approx. 0.225km2 and the extent along the water is approximately is 1070m. There is a deep gradient off Portarthur Beach with the water depth reaching 1m approx. 10m from the water line and continuing out at a deep slope.

Put Portarthur, Derrybeg in your calendar

Dipper Plus drops the best dip hour here into your phone every day, with waves, sea temperature, tide and a 45-minute nudge. Up to three spots.

Set up Dipper Plus
🌊 Portarthur, Derrybeg dip · Fresh · sea 15° · 1.2 mFri, 2 Oct 18:30–19:30 · gentle breeze, dry, waves 1.2 m
🌊 Portarthur, Derrybeg dip · Decent · sea 15° · 1.1 mSat, 3 Oct 10:30–11:30 · moderate breeze, dry, waves 1.1 m
🌊 Portarthur, Derrybeg dip · Fresh · sea 15° · 1.2 mSun, 4 Oct 11:30–12:30 · fresh breeze, dry, waves 1.2 m

Nearby spots

Lough Inishsirrer

2 km · Co. Donegal · Not classified

Loch Bhun an Inbhir

2 km · Co. Donegal · Not classified

Lough Bheithe

3 km · Co. Donegal · Not classified

Loch Mhachaire na nGall

4 km · Co. Donegal · Not classified

Score is Dipper's own blend. It rates comfort, not safety. Forecast: Met Éireann. Waves: Marine Institute Irish Shelf wave model.