Dipper › Co. Roscommon

Derrywanna Lough

Monitored, not designated

🌊 Dip🏄 Surf
Any tidePrefer highPrefer low
Not an EPA-monitored bathing water. This lake comes from OpenStreetMap. There is no water-quality testing, no bathing notices and no facilities information here; the score is weather and daylight only. Check locally for blue-green algae warnings before you swim.
Dip score now
68
Decent · moderate breeze, rain
Wind
21 km/h
Moderate breeze, SW, gusts 46
Daylight
07:36
Sunrise. Sunset 19:08. Air 14°C.

Best dip each day

Daylight hours, preferring low tide
Today
16:00
Grand 94/100
gentle breeze, dry · 19 km/h
☀ 07:36–19:08
Sat, 3 Oct
12:00
Grand 100/100
light winds, dry, sunny · 9 km/h
☀ 07:37–19:06
Sun, 4 Oct
08:00
Grand 97/100
light winds, dry · 11 km/h
☀ 07:39–19:03
Mon, 5 Oct
09:00
Grand 100/100
light winds, dry · 8 km/h
☀ 07:41–19:01
Tue, 6 Oct
19:00
Grand 97/100
light winds, dry · 11 km/h
☀ 07:43–18:59
Wed, 7 Oct
10:00
Grand 92/100
light winds, dry · 9 km/h
☀ 07:45–18:56
Thu, 8 Oct
13:00
Grand 89/100
light winds, showers possible · 9 km/h
☀ 07:47–18:54

Week at a glance

Tap or drag to pick an hour. Everything below follows.
Fri 15:0068 · Decentmoderate breeze · rain
Fri 2Sat 3Sun 4Mon 5Tue 6Wed 7Thu 80003060912151821Fri 13:00 · 46 FreshFri 14:00 · 46 FreshFri 15:00 · 68 DecentFri 16:00 · 94 GrandFri 17:00 · 94 GrandFri 18:00 · 94 GrandFri 19:00 · 91 GrandFri 20:00 · 91 Grand · nightFri 21:00 · 86 Grand · nightFri 22:00 · 86 Grand · nightFri 23:00 · 86 Grand · nightSat 00:00 · 92 Grand · nightSat 01:00 · 86 Grand · nightSat 02:00 · 86 Grand · nightSat 03:00 · 86 Grand · nightSat 04:00 · 86 Grand · nightSat 05:00 · 86 Grand · nightSat 06:00 · 92 Grand · nightSat 07:00 · 92 Grand · nightSat 08:00 · 86 GrandSat 09:00 · 86 GrandSat 10:00 · 92 GrandSat 11:00 · 97 GrandSat 12:00 · 100 GrandSat 13:00 · 100 GrandSat 14:00 · 100 GrandSat 15:00 · 100 GrandSat 16:00 · 100 GrandSat 17:00 · 94 GrandSat 18:00 · 100 GrandSat 19:00 · 97 GrandSat 20:00 · 97 Grand · nightSat 21:00 · 97 Grand · nightSat 22:00 · 97 Grand · nightSat 23:00 · 97 Grand · nightSun 00:00 · 97 Grand · nightSun 01:00 · 92 Grand · nightSun 02:00 · 92 Grand · nightSun 03:00 · 92 Grand · nightSun 04:00 · 97 Grand · nightSun 05:00 · 97 Grand · nightSun 06:00 · 91 Grand · nightSun 07:00 · 97 Grand · nightSun 08:00 · 97 GrandSun 09:00 · 91 GrandSun 10:00 · 94 GrandSun 11:00 · 94 GrandSun 12:00 · 84 GrandSun 13:00 · 94 GrandSun 14:00 · 84 GrandSun 15:00 · 94 GrandSun 16:00 · 72 DecentSun 17:00 · 84 GrandSun 18:00 · 84 GrandSun 19:00 · 94 GrandSun 20:00 · 94 Grand · nightSun 21:00 · 94 Grand · nightSun 22:00 · 94 Grand · nightSun 23:00 · 94 Grand · nightMon 00:00 · 94 Grand · nightMon 01:00 · 84 Grand · nightMon 02:00 · 84 Grand · nightMon 03:00 · 94 Grand · nightMon 04:00 · 76 Decent · nightMon 05:00 · 84 Grand · nightMon 06:00 · 94 Grand · nightMon 07:00 · 100 Grand · nightMon 08:00 · 88 GrandMon 09:00 · 100 GrandMon 10:00 · 81 GrandMon 11:00 · 82 GrandMon 12:00 · 84 GrandMon 13:00 · 94 GrandMon 14:00 · 94 GrandMon 15:00 · 94 GrandMon 16:00 · 94 GrandMon 17:00 · 94 GrandMon 18:00 · 94 GrandMon 19:00 · 94 GrandMon 22:00 · 86 Grand · nightTue 01:00 · 92 Grand · nightTue 04:00 · 86 Grand · nightTue 07:00 · 83 Grand · nightTue 10:00 · 83 GrandTue 13:00 · 89 GrandTue 16:00 · 91 GrandTue 19:00 · 97 GrandTue 22:00 · 92 Grand · nightWed 01:00 · 92 Grand · nightWed 04:00 · 92 Grand · nightWed 07:00 · 92 Grand · nightWed 10:00 · 92 GrandWed 13:00 · 83 GrandWed 16:00 · 73 DecentWed 19:00 · 86 GrandWed 22:00 · 92 Grand · nightThu 01:00 · 92 Grand · nightThu 07:00 · 92 Grand · nightThu 13:00 · 89 GrandThu 19:00 · 73 Decent

Fri, 2 Oct, 15:00

68 Decent
  • moderate breeze
  • rain
NESWsunrisesunset21 km/h
facing unknown
Waves
–
Wind
21 km/h SW · gusts 46
Tide
–
Air
14°C · 1.0 mm rain

Meteogram

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

Hour by hour

Next 48 hours
TimeDipWavesPeriodFromWindGustTideRainAirWhy
Today
14:0046 Fresh–––28 km/h SSW56–4.7 mm14°moderate breeze, rain
15:0068 Decent–––21 km/h SW46–1.0 mm14°moderate breeze, rain
16:0094 Grand–––19 km/h WSW39–dry15°gentle breeze, dry
17:0094 Grand–––17 km/h W38–dry14°gentle breeze, dry
18:0094 Grand–––18 km/h W38–dry13°gentle breeze, dry
19:0091 Grand–––19 km/h W34–dry12°gentle breeze, dry
20:0091 Grand–––14 km/h WSW26–dry10°gentle breeze, dry, sunny
21:0086 Grand–––12 km/h WSW22–dry9°gentle breeze, dry, sunny
22:0086 Grand–––14 km/h WSW19–dry8°gentle breeze, dry, sunny
23:0086 Grand–––14 km/h WSW18–dry8°gentle breeze, dry
Saturday, 3 October
00:0092 Grand–––11 km/h WSW17–dry6°light winds, dry, sunny
01:0086 Grand–––8 km/h SW16–dry5°light winds, dry
02:0086 Grand–––5 km/h WSW15–dry5°light winds, dry
03:0086 Grand–––5 km/h SW14–dry5°light winds, dry
04:0086 Grand–––2 km/h ESE13–dry5°light winds, dry
05:0086 Grand–––2 km/h E12–dry6°light winds, dry
06:0092 Grand–––3 km/h ENE12–dry6°light winds, dry
07:0092 Grand–––3 km/h ESE11–dry6°light winds, dry
08:0086 Grand–––5 km/h E12–dry5°light winds, dry
09:0086 Grand–––6 km/h E12–dry6°light winds, dry
10:0092 Grand–––3 km/h ESE14–dry8°light winds, dry, sunny
11:0097 Grand–––5 km/h W17–dry12°light winds, dry, sunny
12:00100 Grand–––9 km/h W21–dry14°light winds, dry, sunny
13:00100 Grand–––7 km/h WSW23–dry15°light winds, dry, sunny
14:00100 Grand–––6 km/h SW25–dry15°light winds, dry
15:00100 Grand–––9 km/h SSW27–dry15°light winds, dry
16:00100 Grand–––12 km/h SSW29–dry15°light winds, dry, sunny
17:0094 Grand–––14 km/h SSW30–dry15°gentle breeze, dry
18:00100 Grand–––10 km/h SSW28–dry14°light winds, dry
19:0097 Grand–––6 km/h S24–dry12°light winds, dry
20:0097 Grand–––5 km/h SSE19–dry11°light winds, dry
21:0097 Grand–––6 km/h S19–dry10°light winds, dry
22:0097 Grand–––9 km/h SSW22–dry10°light winds, dry
23:0097 Grand–––11 km/h S26–dry11°light winds, dry
Sunday, 4 October
00:0097 Grand–––10 km/h SSW29–dry11°light winds, dry
01:0092 Grand–––9 km/h SSE31–dry10°light winds, dry
02:0092 Grand–––7 km/h SE32–dry9°light winds, dry
03:0092 Grand–––7 km/h SE32–dry10°light winds, dry
04:0097 Grand–––10 km/h S33–0.1 mm11°light winds, dry
05:0097 Grand–––12 km/h SSW34–0.1 mm11°light winds, dry
06:0091 Grand–––15 km/h SSW34–0.1 mm12°gentle breeze, dry
07:0097 Grand–––12 km/h SW33–0.1 mm12°light winds, dry
08:0097 Grand–––11 km/h SSW33–0.1 mm12°light winds, dry
09:0091 Grand–––14 km/h SSW34–0.1 mm13°gentle breeze, dry
10:0094 Grand–––16 km/h SSW35–0.1 mm13°gentle breeze, dry
11:0094 Grand–––18 km/h SSW35–0.1 mm14°gentle breeze, dry
12:0084 Grand–––20 km/h SSW35–0.1 mm14°moderate breeze, dry
13:0094 Grand–––19 km/h SSW36–0.1 mm14°gentle breeze, dry

The spot

Faces
Unknown (inland)
Swell window
None (sheltered)
Exposure
Lake
Water
Not classified

Lakes have no tide or swell; the score is wind, rain, air temperature and daylight. Know better? Tell us.

Getting there

Open in Maps · OpenStreetMap

Access, parking and swimming areas are not recorded for this lake. Respect private land.

Sauna after?

Cavetown Lake Sauna · Cavetown Lough, near Croghan · 15 km · fixed

Lough Allen Adventure Sauna · Lough Allen Adventure Centre, Ballinaglera, Co. Leitrim · 15 km · fixed

Put Derrywanna Lough 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
🌊 Derrywanna Lough dip · GrandFri, 2 Oct 15:30–16:30 · gentle breeze, dry
🌊 Derrywanna Lough dip · GrandSat, 3 Oct 11:30–12:30 · light winds, dry, sunny
🌊 Derrywanna Lough dip · GrandSun, 4 Oct 07:30–08:30 · light winds, dry

Nearby spots

Cornacarta Lough

0 km · Co. Roscommon · Not classified

Derrynasallagh Lough

1 km · Co. Roscommon · Not classified

Black Lough

1 km · Co. Roscommon · Not classified

Loughankedy

3 km · Co. Roscommon · Not classified

Score is Dipper's own blend. It rates comfort, not safety. Forecast: Met Éireann. Lake data: © OpenStreetMap contributors.