Dipper › Co. Donegal

Portarthur, Derrybeg

Excellent Quality 2025 Green Coast faces NW

🌊 Dip🏄 Surf
Any tidePrefer highPrefer low
Dip score now
20
Grim · 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 low tide
Today
16:00
Decent 78/100
light winds, dry, waves 1.2 m · 1.2 m · 12 km/h
▼ 03:35 ▲ 10:00 ▼ 16:10 ▲ 22:35
Sat, 3 Oct
19:00
Decent 70/100
gentle breeze, dry, waves 1.1 m · 1.1 m · 19 km/h
▼ 04:25 ▲ 11:05 ▼ 17:40 ▲ 23:50
Sun, 4 Oct
19:00
Fresh 48/100
fresh breeze, dry, waves 1.2 m · 1.2 m · 35 km/h
▼ 05:40 ▲ 12:40 ▼ 19:25
Mon, 5 Oct
19:00
Blowy 43/100
moderate breeze, rain, waves 1.2 m · 1.2 m · 27 km/h
▲ 01:35 ▼ 07:30 ▲ 14:10 ▼ 21:05
Tue, 6 Oct
10:00
Fresh 61/100
gentle breeze, showers possible, waves 1.2 m · 1.2 m · 14 km/h
▲ 03:05 ▼ 09:00 ▲ 15:30 ▼ 22:05
Wed, 7 Oct
10:00
Decent 63/100
moderate breeze, onshore, choppy, rain · 21 km/h
▲ 04:05 ▼ 09:55 ▲ 16:25 ▼ 22:50
Thu, 8 Oct
13:00
Decent 73/100
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 09:0021 · Grimfresh breeze · offshore, flatter inshore
Fri 2Sat 3Sun 4Mon 5Tue 6Wed 7Thu 80003060912151821Fri 09:00 · 21 GrimFri 10:00 · 13 GrimFri 11:00 · 6 GrimFri 12:00 · 1 GrimFri 13:00 · 3 GrimFri 14:00 · 37 BlowyFri 15:00 · 53 FreshFri 16:00 · 78 DecentFri 17:00 · 59 FreshFri 18:00 · 58 FreshFri 19:00 · 61 FreshFri 20:00 · 30 Blowy · nightFri 21:00 · 42 Blowy · nightFri 22:00 · 32 Blowy · nightFri 23:00 · 31 Blowy · nightSat 00:00 · 42 Blowy · nightSat 01:00 · 47 Fresh · nightSat 02:00 · 51 Fresh · nightSat 03:00 · 56 Fresh · nightSat 04:00 · 61 Fresh · nightSat 05:00 · 61 Fresh · nightSat 06:00 · 56 Fresh · nightSat 07:00 · 52 Fresh · nightSat 08:00 · 48 FreshSat 09:00 · 44 BlowySat 10:00 · 43 BlowySat 11:00 · 38 BlowySat 12:00 · 42 BlowySat 13:00 · 46 FreshSat 14:00 · 50 FreshSat 15:00 · 55 FreshSat 16:00 · 59 FreshSat 17:00 · 63 DecentSat 18:00 · 64 DecentSat 19:00 · 70 DecentSat 20:00 · 55 Fresh · nightSat 21:00 · 51 Fresh · nightSat 22:00 · 46 Fresh · nightSat 23:00 · 26 Grim · nightSun 00:00 · 23 Grim · nightSun 01:00 · 20 Grim · nightSun 02:00 · 24 Grim · nightSun 03:00 · 29 Blowy · nightSun 04:00 · 26 Grim · nightSun 05:00 · 31 Blowy · nightSun 06:00 · 33 Blowy · nightSun 07:00 · 29 Blowy · nightSun 08:00 · 33 BlowySun 09:00 · 29 BlowySun 10:00 · 25 GrimSun 11:00 · 21 GrimSun 12:00 · 25 GrimSun 13:00 · 15 GrimSun 14:00 · 20 GrimSun 15:00 · 32 BlowySun 16:00 · 36 BlowySun 17:00 · 40 BlowySun 18:00 · 44 BlowySun 19:00 · 48 FreshSun 20:00 · 47 Fresh · nightSun 21:00 · 43 Blowy · nightSun 22:00 · 38 Blowy · nightSun 23:00 · 34 Blowy · nightMon 00:00 · 13 Grim · nightMon 01:00 · 25 Grim · nightMon 02:00 · 8 Grim · nightMon 03:00 · 13 Grim · nightMon 04:00 · 33 Blowy · nightMon 05:00 · 22 Grim · nightMon 06:00 · 19 Grim · nightMon 07:00 · 40 Blowy · nightMon 10:00 · 27 GrimMon 13:00 · 14 GrimMon 16:00 · 16 GrimMon 19:00 · 43 BlowyMon 22:00 · 46 Fresh · nightTue 01:00 · 33 Blowy · nightTue 04:00 · 28 Blowy · nightTue 07:00 · 51 Fresh · nightTue 10:00 · 61 FreshTue 13:00 · 48 FreshTue 16:00 · 39 BlowyTue 19:00 · 52 FreshTue 22:00 · 65 Decent · nightWed 01:00 · 51 Fresh · nightWed 04:00 · 55 Fresh · nightWed 07:00 · 69 Decent · nightWed 10:00 · 63 DecentWed 13:00 · 50 FreshWed 19:00 · 44 BlowyThu 01:00 · 37 Blowy · nightThu 07:00 · 61 Fresh · nightThu 13:00 · 73 DecentThu 19:00 · 43 Blowy

Fri, 2 Oct, 09:00

21 Grim
  • 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
09:0021 Grim1.3 m (1.2 swell)12 sWNW30 km/h SSE513.3 m ▲0.4 mm13°fresh breeze, offshore, flatter inshore, showers possible
10:0013 Grim1.3 m (1.1 swell)12 sWNW31 km/h S533.5 m ▲0.8 mm13°fresh breeze, offshore, flatter inshore, rain
11:006 Grim1.3 m (1.1 swell)12 sWNW32 km/h S563.4 m ▲1.4 mm13°fresh breeze, offshore, flatter inshore, rain
12:001 Grim1.3 m (1.1 swell)12 sWNW29 km/h S593.0 m 3.0 mm13°fresh breeze, offshore, flatter inshore, rain
13:003 Grim1.2 m (1.1 swell)11 sWNW33 km/h SSW582.4 m 2.4 mm14°fresh breeze, rain, waves 1.2 m
14:0037 Blowy1.2 m (1.1 swell)11 sWNW23 km/h SSW521.8 m 1.1 mm13°moderate breeze, rain, waves 1.2 m
15:0053 Fresh1.2 m (1.0 swell)11 sWNW27 km/h SSW491.4 m ▼0.4 mm13°moderate breeze, showers possible, waves 1.2 m
16:0078 Decent1.2 m (1.0 swell)11 sWNW12 km/h W451.2 m ▼0.1 mm13°light winds, dry, waves 1.2 m
17:0059 Fresh1.2 m (1.0 swell)11 sWNW21 km/h WSW471.2 m ▼dry13°moderate breeze, dry, waves 1.2 m
18:0058 Fresh1.2 m (1.0 swell)11 sWNW26 km/h WSW491.5 m dry13°moderate breeze, dry, waves 1.2 m
19:0061 Fresh1.2 m (1.0 swell)11 sWNW19 km/h W471.9 m dry12°gentle breeze, dry, waves 1.2 m
20:0030 Blowy1.2 m (1.0 swell)11 sNW29 km/h W442.5 m dry12°fresh breeze, dry, waves 1.2 m
21:0042 Blowy1.2 m (1.0 swell)11 sNW25 km/h W432.9 m dry12°moderate breeze, dry, waves 1.2 m
22:0032 Blowy1.2 m (1.0 swell)11 sNW28 km/h W423.1 m ▲dry12°moderate breeze, onshore, choppy, dry
23:0031 Blowy1.2 m (1.0 swell)11 sNW27 km/h W403.2 m ▲dry12°moderate breeze, onshore, choppy, dry
Saturday, 3 October
00:0042 Blowy1.2 m (0.9 swell)11 sNW26 km/h W393.0 m dry12°moderate breeze, dry, waves 1.2 m
01:0047 Fresh1.2 m (0.9 swell)11 sNW24 km/h W372.6 m dry12°moderate breeze, dry, waves 1.2 m
02:0051 Fresh1.2 m (0.9 swell)11 sNW24 km/h WSW362.1 m dry12°moderate breeze, dry, waves 1.2 m
03:0056 Fresh1.2 m (0.9 swell)11 sNW23 km/h WSW351.6 m dry12°moderate breeze, dry, waves 1.2 m
04:0061 Fresh1.2 m (0.9 swell)11 sNW24 km/h WSW361.3 m ▼dry13°moderate breeze, dry, waves 1.2 m
05:0061 Fresh1.2 m (0.9 swell)11 sNW24 km/h WSW381.3 m ▼dry12°moderate breeze, dry, waves 1.2 m
06:0056 Fresh1.2 m (0.8 swell)11 sNW24 km/h WSW391.5 m 0.1 mm12°moderate breeze, dry, waves 1.2 m
07:0052 Fresh1.2 m (0.8 swell)10 sNW25 km/h WSW391.9 m dry13°moderate breeze, dry, waves 1.2 m
08:0048 Fresh1.1 m (0.8 swell)10 sNW23 km/h WSW362.4 m dry13°moderate breeze, dry, waves 1.2 m
09:0044 Blowy1.1 m (0.8 swell)10 sNW21 km/h WSW332.8 m dry13°moderate breeze, dry, waves 1.1 m
10:0043 Blowy1.1 m (0.8 swell)10 sNW23 km/h WSW333.1 m ▲dry14°moderate breeze, dry, waves 1.1 m
11:0038 Blowy1.1 m (0.7 swell)10 sNW22 km/h WSW343.3 m ▲dry14°moderate breeze, dry, waves 1.1 m
12:0042 Blowy1.1 m (0.7 swell)10 sNW22 km/h SW363.2 m ▲dry14°moderate breeze, dry, waves 1.1 m
13:0046 Fresh1.1 m (0.7 swell)10 sWNW24 km/h SW373.0 m dry14°moderate breeze, dry, waves 1.1 m
14:0050 Fresh1.1 m (0.7 swell)10 sWNW25 km/h SW392.5 m dry14°moderate breeze, dry, waves 1.1 m
15:0055 Fresh1.1 m (0.7 swell)10 sWNW25 km/h SW402.1 m dry15°moderate breeze, dry, waves 1.1 m
16:0059 Fresh1.1 m (0.7 swell)10 sWNW24 km/h SW401.7 m dry15°moderate breeze, dry, waves 1.1 m
17:0063 Decent1.1 m (0.7 swell)10 sWNW21 km/h SSW401.5 m ▼dry15°moderate breeze, dry, waves 1.1 m
18:0064 Decent1.1 m (0.7 swell)10 sWNW21 km/h SSW401.4 m ▼dry14°moderate breeze, dry, waves 1.1 m
19:0070 Decent1.1 m (0.7 swell)10 sWNW19 km/h SSW411.6 m dry14°gentle breeze, dry, waves 1.1 m
20:0055 Fresh1.1 m (0.8 swell)10 sWNW26 km/h SSW441.9 m dry14°moderate breeze, dry, waves 1.1 m
21:0051 Fresh1.1 m (0.8 swell)10 sWNW27 km/h SSW482.2 m dry14°moderate breeze, dry, waves 1.1 m
22:0046 Fresh1.2 m (0.8 swell)10 sWNW27 km/h SSW502.6 m dry13°moderate breeze, dry, waves 1.2 m
23:0026 Grim1.2 m (0.8 swell)10 sWNW30 km/h S522.8 m ▲dry14°fresh breeze, dry, waves 1.2 m
Sunday, 4 October
00:0023 Grim1.2 m (0.8 swell)10 sWNW30 km/h S542.9 m ▲0.1 mm14°fresh breeze, dry, waves 1.2 m
01:0020 Grim1.2 m (0.8 swell)10 sWNW31 km/h SSW552.9 m 0.1 mm14°fresh breeze, dry, waves 1.2 m
02:0024 Grim1.2 m (0.8 swell)10 sWNW32 km/h S562.6 m 0.1 mm14°fresh breeze, dry, waves 1.2 m
03:0029 Blowy1.2 m (0.8 swell)10 sWNW33 km/h SSW572.2 m 0.1 mm14°fresh breeze, dry, waves 1.2 m
04:0026 Grim1.2 m (0.8 swell)10 sWNW33 km/h SSW571.8 m 0.2 mm15°fresh breeze, showers possible, waves 1.2 m
05:0031 Blowy1.2 m (0.8 swell)10 sWNW35 km/h SSW571.6 m ▼0.2 mm15°fresh breeze, showers possible, waves 1.2 m
06:0033 Blowy1.2 m (0.8 swell)10 sWNW32 km/h SSW571.5 m ▼0.2 mm15°fresh breeze, showers possible, waves 1.2 m
07:0029 Blowy1.2 m (0.8 swell)10 sWNW32 km/h SSW561.6 m ▼0.2 mm15°fresh breeze, showers possible, waves 1.2 m
08:0033 Blowy1.2 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 · Decent · sea 15° · 1.2 mFri, 2 Oct 15:30–16:30 · light winds, dry, waves 1.2 m
🌊 Portarthur, Derrybeg dip · Decent · sea 15° · 1.1 mSat, 3 Oct 18:30–19:30 · gentle breeze, dry, waves 1.1 m
🌊 Portarthur, Derrybeg dip · Fresh · sea 15° · 1.2 mSun, 4 Oct 18:30–19:30 · 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.