Greencastle tides today
- Tide now 4.5 ft ↓ falling · low 1:42 am (0.9 ft)
- Best time tomorrow 7:10–8:20 am good day · 7/10
- Beach day Not today Not a beach day · 0/10
- Waves · water 4.1 ft · 52 °F slight · 9.9 s from the northwest
- Wind · air 7 mph · 55 °F from the S, gusts 17 · overcast
- Sun 7:24 am–4:59 pm 9 h 35 min of daylight
- Moon 92% · 5:25 pm waning gibbous · rises at 5:25 pm
- Diving tomorrow 1:40–3:00 pm average day · 6/10
Today in Greencastle there are high tides at 7:23 am (5.8 ft) and 7:50 pm (5.8 ft) and low tides at 1:02 am and 1:30 pm. Tide coefficient 108. Right now the tide is falling toward the low tide at 1:42 am. The sun rises at 7:24 am and sets at 4:59 pm: 9 h 35 min of daylight. The moon is 92% illuminated (waning gibbous) and rises at 5:25 pm. Major solunar periods run from 12:51 am to 2:51 am and from 1:22 pm to 3:22 pm. The next spring tides arrive from October 26 to 28. The sea is slight, with 4.1 ft waves. There's a light breeze from the south (7 mph). Overcast, 55 °F.
Fishing in Greencastle today
Best time to fish
Solunar activity today: high- High tide at 7:23 am, coefficient 108
- Sunrise at 7:24 am
- Rising pressure (+0.69 inHg in 24 h), light offshore wind (12 mph) and 5.6 ft waves
- Waning gibbous: a bit more activity than at the quarters
- Highest tide coefficient today: 108 (big spring tides)
- A minor period lines up with sunset
Your day at a glance
The best window, 6:50 am to 8:20 am, combines the 7:23 am high tide and sunrise, though with rising pressure. Also worth a try from 1:20 pm to 2:30 pm, with the 1:30 pm low tide and a major period, though with rising pressure and moderate wind. Also worth a try from 5:00 pm to 5:40 pm, with moonrise, sunset and some swell, though with rising pressure.
Species with the most records nearby: small-spotted catshark, European flounder, whiting and veined squid. October is one of the months when these are seen most: European flounder and Atlantic horse mackerel. What you can catch
Beach day in Greencastle
Is it a beach day?
- Low tide at 1:30 pm: more sand
- Cloudy (89% cloud cover)
- Feels like 51 °F: chilly for the beach
- Moderate offshore wind (16 mph): it blows floats and inflatables out to sea
- Swim with care: 5.6 ft waves every 10 s; moderate rip current risk
- Water at 52 °F (very cold)
Today, hour by hour
- Swimming Use care · 5.6 ft
5.6 ft waves every 10 s: swim with care and stay where you can stand. Moderate rip current risk. Always follow the lifeguard's flags.
- Water 52 °F
Very cold: ease in and keep swims short.
- Sun & sunscreen UV 1 · SPF 15
Max UV 1 (low): SPF 15 sunscreen.
- Wind 16 mph
Moderate offshore wind (16 mph). Skip the inflatables: offshore wind carries them out to sea.
- Tide & sand 1:02 am
Low tide at 1:02 am and 1:30 pm: that's when there's the most sand. High tide at 7:23 am and 7:50 pm. Coefficient 108 (spring tides): little sand left at high tide.
We don't have data on jellyfish, sargassum or beach closures: ask the lifeguard or check with the local beach authority. How it works · The next 7 days
Beaches near Greencastle
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- Sweet Nellie's 1.6 mi · NE
- White Strand 2.1 mi · NE
- Magilligan - Benone Strand 3.9 mi · E
- RNLI lifeguards in season
- Restrooms
- Showers
- Parking
Excellent water quality 2025 season, DAERA
- Kinnagoe Bay 4.1 mi · N
- Parking
- Tremone Bay 6.0 mi · NW
- Parking
Named beaches within 6.2 mi, nearest first. Amenities from OpenStreetMap: some may be missing or out of date. View on OpenStreetMap · Add or fix on OpenStreetMap
Beaches and amenities: © OpenStreetMap contributors (ODbL). Bathing water quality: European Environment Agency (EEA), with data from the authorities of Ireland.
UK bathing water quality: DAERA. Contains public sector information licensed under the Open Government Licence v3.0. Full attribution. Lifeguards: RNLI. Contains Open Data licensed under the GIS Open Data Licence.
Webcams near Greencastle
Webcams provided by windy.com — add a webcam
Tides in Greencastle
Today's high and low tides
- ▼ Low tide 1:02 am 0.7 ft
- ▲ High tide 7:23 am 5.8 ft · coef. 108
- ▼ Low tide 1:30 pm 0.8 ft
- ▲ High tide 7:50 pm 5.8 ft · coef. 104
↓ Falling The tide is falling. 3 h 51 min to low tide at 1:42 am.
Tide coefficient 108 for the 7:23 am high tide and 104 for the 7:50 pm high tide. Big spring tides. The water rises and falls 5.1 ft between the highest high and the lowest low: a large range for this place. 70 is an average tide here; 90 and above means spring tides; below 45, neap tides. What is the tide coefficient?
2026 extremes: the highest tide of the year is on August 13 (7.6 ft) and the lowest, on February 4 (0.1 ft).
Semidiurnal: two high and two low tides a day, of similar height.
Heights above chart datum: the lowest astronomical tide (LAT), the zero of nautical charts in Europe. Astronomical prediction: wind and air pressure can raise or lower the water by a few inches, and more in a storm. Not for navigation. chart datum (LAT)
Tide coefficient and range in October
The biggest tides of the month came from October 26 to 27 (coefficient 111, 5.6 ft range). The smallest, on October 18 (coefficient 31, 1.3 ft).
Tide and solunar table · this week
| Day | Sun | Tide 1 | Tide 2 | Tide 3 | Tide 4 | Coef. | Moon | Major periods | Activity |
|---|---|---|---|---|---|---|---|---|---|
| Today, Wed 28 | 7:24 am · 4:59 pm | Low tide 1:02 am · 0.7 ft | High tide 7:23 am · 5.8 ft | Low tide 1:30 pm · 0.8 ft | High tide 7:50 pm · 5.8 ft | Coef. 108 | 92% | Major periods 12:51 am · 1:22 pm | High |
| Thu 29 | 7:26 am · 4:56 pm | Low tide 1:42 am · 0.9 ft | High tide 8:07 am · 5.6 ft | Low tide 2:17 pm · 1.1 ft | High tide 8:38 pm · 5.2 ft | Coef. 98 | 85% | Major periods 1:54 am · 2:27 pm | High |
| Fri 30 | 7:28 am · 4:54 pm | Low tide 2:26 am · 1.3 ft | High tide 8:57 am · 5.3 ft | Low tide 3:13 pm · 1.6 ft | High tide 9:34 pm · 4.5 ft | Coef. 82 | 76% | Major periods 2:59 am · 3:31 pm | Medium |
| Sat 31 | 7:30 am · 4:52 pm | Low tide 3:15 am · 1.8 ft | High tide 9:59 am · 4.9 ft | Low tide 4:39 pm · 2.1 ft | High tide 10:57 pm · 3.9 ft | Coef. 63 | 65% | Major periods 4:02 am · 4:32 pm | Medium |
| Sun 1 | 7:32 am · 4:50 pm | Low tide 4:14 am · 2.2 ft | High tide 11:58 am · 4.5 ft | Low tide 7:27 pm · 2.1 ft | — | Coef. 50 | Last quarter | Major periods 5:01 am · 5:28 pm | Low |
| Mon 2 | 7:34 am · 4:48 pm | High tide 1:12 am · 3.6 ft | Low tide 5:35 am · 2.4 ft | High tide 1:51 pm · 4.5 ft | Low tide 8:44 pm · 1.7 ft | Coef. 49 | 43% | Major periods 5:55 am · 6:20 pm | Medium |
| Tue 3 | 7:36 am · 4:46 pm | High tide 2:24 am · 3.5 ft | Low tide 7:29 am · 2.2 ft | High tide 2:57 pm · 4.5 ft | Low tide 9:40 pm · 1.5 ft | Coef. 55 | 32% | Major periods 6:44 am · 7:07 pm | Medium |
▲ high tide · ▼ low tide · heights above chart datum (LAT). Major periods: start time; they last 2 hours. Activity: based on the moon phase and the solunar periods.
Where this tide comes from
Greencastle has no station of its own, so we use the tide at Portrush (Environment Agency), 13 mi away. On the open coast the difference is usually a few minutes and inches; inside estuaries, rivers and enclosed bays it can be much larger.
Station data attribution: This uses Environment Agency tide gauge data from the real-time data API (Beta): Portrush (E73924), https://environment.data.gov.uk/flood-monitoring/id/stations/E73924. Contains public sector information licensed under the Open Government Licence v3.0 (https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/). Modified: harmonic constants fitted by TidePlanet from the 15-minute sea levels of 2025-10-29 to 2026-10-22 (356 days).
The sea at Greencastle
Sea stateSea state: slight
The waves you may find
- Most commonMost common2.1 ft
- Significant4.1 ft
- Highest expectedHighest8.2 ft
One wave in seven is higher than the significant height, and about 3 times a day one reaches 8.2 ft. Before heading out, expect waves of up to 8.2 ft.
Wind on the coast and offshore
Cross-offshore wind. The coast faces east and the wind comes off the land at an angle: calmer water near the shore, and bait and boats drift out to sea.
Wave height, next 7 daysWaves, next 7 days
Waves ease over the next few days. The biggest waves arrive on Wednesday 28: 6.4 ft with a period of 10 s, from the northwest (moderate).
Water temperature
Water temperature →Water temperature changes how fish behave: in very cold or very warm water they feed less. The water is steady these days, with no sudden changes.
Water about normal for late October.
Satellite: NASA MUR (JPL MUR MEaSUREs, PO.DAAC), doi:10.5067/GHGMR-4FJ04. Sources and licenses
Water temperature →Forecast from Open-Meteo (CC BY 4.0) with models from ECMWF, NOAA, Météo-France, DWD, Copernicus Marine and CAMS. Updated at 9:51 pm (local time).
Diving in Greencastle today
Diving and snorkeling today
Likely visibility: poor- Slack water around low tide (1:30 pm): little current from 1:15 pm to 1:45 pm
- 4.9 ft swell at 9 s from the northwest: strong surge on the bottom
- Moderate offshore wind (13 mph): it pushes surface swimmers away from shore
- 0.0 mph current toward the east, weak (model)
- Sun high: more light underwater
- Slack water today: low tide 1:02 am (12:47–1:17 am), high tide 7:23 am (7:08–7:38 am), low tide 1:30 pm (1:15–1:45 pm) and high tide 7:50 pm (7:35–8:05 pm)
- Likely visibility: poor. Swell (up to 6.1 ft at 10 s) and wind over the last few days have stirred up the water. Based on the last 24 hours of data.
- Water at 52.2 °F: a 7 mm semi-dry suit, with hood, gloves and booties.
- Snorkeling: better not, with these waves, wind or current.
- Night dive: dark from 5:37 pm. Waning gibbous (92%), rising at 5:25 pm: a bright night.
Your diving day at a glance
The best window, 1:30 pm to 2:10 pm, combines slack water at low tide, weak current and the sun high, though with some swell and moderate wind. Also worth a look from 7:10 am to 8:10 am, with slack water at high tide, light wind and weak current, though with a big swell.
Slack water comes from the tide: in inlets, channels and between islands the water can keep running for an hour or two after. Ask the local dive shop.
Never dive alone and check with the local dive shop: this rating is a guide, not a substitute for a professional.
Dive sites, wrecks and dive shops nearby
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- HMS Assurance 2.1 mi
- Stypie 3.4 mi
- William Mannel 8.3 mi
- Mountain Laurel 8.5 mi
- Castle Eden 8.9 mi
- Towy 12 mi
- Wreck 6.5 mi
- Wreck 12 mi
- Wreck 12 mi
- Wreck 12 mi
- Red Duck Diving 12 mi
- Freedive Northern Ireland 12 mi
Within 12 mi. Some may be missing or closed; marine reserves usually need a permit. Open the map on OpenStreetMap · Missing one? Add it to OpenStreetMap
Wreck and reef positions are approximate and not for navigation; a wreck’s depth runs from the top of the hull to the seabed.
Sites: © OpenStreetMap contributors (ODbL). Wrecks: EMODnet Human Activities (AND-International), from UK Hydrographic Office data, CC BY 4.0. Contains public sector information licensed under the Open Government Licence v3.0.
Weather in Greencastle
Now in Greencastle
- Low / high
- 50 / 56 °F
- Rain
- 0.05 in · 100%
- Clouds
- 100%
- Humidity
- 86%
- Dew pointDew point
- 51 °F
- Visibility
- 17 mi
- UV indexUV
- 0 · low
- Air qualityAir
- Fair · 24
- Saharan dust
- No
- Pollen
- None
Pressure and fishing
- ↗ RisingRising · now Anglers say fish bite less for a while
- → SteadySteady Anglers expect normal activity
- ↘ FallingFalling Anglers say fish feed more before the change
Rising now (+0.04 inHg in 3 hours). Over the next 48 hours: +0.17 inHg. Rising pressure: anglers say fish bite less for a while. Fast changes, either way, tend to affect fishing.
Today, hour by hourHour by hour
Bars: mean wind. Dashed line: gusts. Arrows point where the wind blows to.
| Time | 12:00 am | 3:00 am | 6:00 am | 9:00 am | 12:00 pm | 3:00 pm | 6:00 pm | 9:00 pm |
|---|---|---|---|---|---|---|---|---|
| Sky | Overcast | Light rain | Overcast | Overcast | Partly cloudy | Overcast | Overcast | Overcast |
| Temperature | 50° | 53° | 53° | 53° | 56° | 56° | 55° | 55° |
| Wind (mph) | 21 SSW | 16 SW | 12 SW | 11 SW | 15 WSW | 12 SW | 9 SSW | 7 S |
| Gusts | 41 | 37 | 26 | 25 | 28 | 24 | 21 | 18 |
| Waves | 6.4 ft | 6.3 ft | 5.9 ft | 5.4 ft | 5.2 ft | 4.9 ft | 4.5 ft | 4.2 ft |
| Rain | 0.00 in | 0.01 in | 0.00 in | 0.00 in | 0.00 in | 0.00 in | 0.00 in | 0.00 in |
- 9:00 pm 55° 7 S 4.2 ft
- 12:00 am 54° 8 S 3.9 ft
- 3:00 am 54° 9 S 3.6 ft
- 6:00 am 53° 9 S 3.2 ft
- 9:00 am 54° 10 SSE 2.9 ft
- 12:00 pm 55° 15 S 2.6 ft
- 3:00 pm 56° 15 S 2.4 ft
- 6:00 pm 54° 14 SSE 2.2 ft
Next 14 daysComing days
| Day | Sky | Low / high | Max wind | Max wave | High tides |
|---|---|---|---|---|---|
| Today · 28 | 50 / 56 °F | 22 mph SW | 6.4 ft | 7:23 am · 7:50 pm | |
| Thu 29 | 53 / 56 °F | 17 mph SSE | 3.9 ft | 8:07 am · 8:38 pm | |
| Fri 30 | 53 / 58 °F | 20 mph S | 2.5 ft | 8:57 am · 9:34 pm | |
| Sat 31 | 52 / 58 °F | 9 mph SW | 2.8 ft | 9:59 am · 10:57 pm | |
| Sun 1 | 49 / 53 °F | 10 mph NNW | 2.8 ft | 11:58 am | |
| Mon 2 | 46 / 53 °F | 6 mph ESE | 2.4 ft | 1:12 am · 1:51 pm | |
| Tue 3 | 42 / 50 °F | 4 mph S | 1.3 ft | 2:24 am · 2:57 pm | |
| Wed 4 | 48 / 51 °F | 9 mph SE | 1.7 ft | 3:16 am · 3:49 pm | |
| Thu 5 | 47 / 51 °F | 11 mph SE | 1.7 ft | 3:57 am · 4:30 pm | |
| Fri 6 | 47 / 52 °F | 15 mph SE | 1.8 ft | 4:30 am · 5:03 pm | |
| Sat 7 | 45 / 50 °F | 9 mph SE | 1.4 ft | 5:00 am · 5:29 pm | |
| Sun 8 | 39 / 48 °F | 8 mph SE | 1.6 ft | 5:31 am · 5:54 pm | |
| Mon 9 | 47 / 53 °F | 11 mph ESE | 1.9 ft | 6:04 am · 6:21 pm | |
| Tue 10 | 53 / 54 °F | 11 mph E | 2.1 ft | 6:40 am · 6:50 pm |
- Thu 29 Overcast 53° / 56° 3.9 ft
- Fri 30 Light showers 53° / 58° 2.5 ft
- Sat 31 Light showers 52° / 58° 2.8 ft
- Sun 1 Overcast 49° / 53° 2.8 ft
- Mon 2 Partly cloudy 46° / 53° 2.4 ft
- Tue 3 Overcast 42° / 50° 1.3 ft
- Wed 4 Light drizzle 48° / 51° 1.7 ft
Each day comes from the best model covering this spot: regional ones first (HRRR and NBM in the U.S., AROME, ICON-EU), then ECMWF; day 16, NOAA GFS. Waves: Météo-France up to day 10, then ECMWF WAM, coarser and further offshore. High tides: our own tide calculation.
- Normal Today, warmer than normal for late October (+3.4 °F; normal high: 53 °F). Climate by month →
Forecast from Open-Meteo (CC BY 4.0) with models from ECMWF, NOAA, Météo-France, DWD, Copernicus Marine and CAMS. Updated at 9:51 pm (local time).
The sun in Greencastle
Sunrise and sunset
- First light 6:03 am
- Full dark 6:20 pm
- Civil dawn 6:46 am
- Civil dusk 5:37 pm
- Solar noon 12:12 pm (22° high)
- Daylight 9 h 35 min (−4 min)
- Evening golden hour 4:04 pm
- Full dark 6:20 pm
Golden hour and the day-night map
Today the sun is 92,359,387 mi away and looks 32′ 11″ across.
The moon in Greencastle
Moon phase and position
Today the moon is 226,451 mi away and looks 32′ 47″ across.
Solunar periods
Today's activity: high- 12:51–2:51 am Major · the moon passes overhead · high activity
- 1:22–3:22 pm Major · the moon passes underfoot · high activity
- 10:43–11:43 am Minor · moonset · medium activity
- 4:55–5:55 pm Minor · moonrise · medium activity
According to solunar theory, fish feed more when the moon passes overhead or underfoot (major periods, about 2 h) and when it rises or sets (minor periods, 1 h). It works best around new and full moon.
Upcoming moon phases
2026 moon calendar →- Last quarter Sun, Nov 1 · 8:29 pmNov 1 in 4 days
- New moon Mon, Nov 9 · 7:03 amNov 9 in 12 days
- First quarter Tue, Nov 17 · 11:48 amNov 17 in 20 days
- Full moon Tue, Nov 24 · 2:54 pmNov 24 in 27 days
Perigee on October 28, 226,426 mi away, coinciding with the spring tides from October 26 to 28: they will be stronger than usual.
Where to fish in Greencastle
Piers, ramps and tackle shops nearby
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- Boat ramp 0.2 mi
- Boat ramp 0.9 mi
- Boat ramp 2.0 mi
- Boat ramp 2.3 mi
- Boat ramp 2.5 mi
- Boat ramp 2.6 mi
- Boat ramp 8.4 mi
Within 9.3 mi. A spot may be missing or closed. Open the map on OpenStreetMap · Missing one? Add it to OpenStreetMap
Spots: © OpenStreetMap contributors (ODbL) and Overture Maps.
Water depth
Drops off fastThe bottom drops off fast: the water is 33 ft deep just 100 ft from shore.
From the shoreline out to sea, heading east.
How far from shore
- 16 ft deep50 ft
- 33 ft deep100 ft
- 66 ft deepnot within 3.1 mi
- 164 ft deepnot within 3.1 mi
For fishing, swimming and diving
- Shore fishing. Deep water close in: about 54 ft just 330 ft out. Good for casting from rocks, jetties or the beach itself; current and surf hit harder here.
- Swimming. The bottom drops quickly near the shore and you are soon out of your depth. Keep an eye on kids and weak swimmers.
- Diving. 33 ft deep 100 ft from shore; 66 ft is far out (beyond 3.1 mi): for deeper dives, go by boat.
Inside bays, estuaries and harbors the bottom changes a lot from spot to spot (channels and shoals): use this only as a rough guide. Right by the shore the bottom may drop even faster than shown. Where the bottom comes up to the surface there are shoals, rocks or an islet next to the profile.
Source: EMODnet Bathymetry DTM 2024 (CC BY 4.0), cells of about 380 ft; depth at the lowest astronomical tide. For reference only: not for navigation or anchoring.
Nearest lighthouse
Warren Point Lighthouse 1.4 mi northeast
Other lighthouses nearby: Moville Lighthouse (2.4 mi southwest), Inishowen Lighthouse (2.8 mi northeast).
Data from Wikidata. For reference only: not for navigation. Wikidata · Sources and licenses
Tides near GreencastleTides nearby
- Moville2.3 mi
- Castlerock8.6 mi
- Culdaff9.2 mi
- Quigley’s Point9.9 mi
- Portstewart11 mi
- Ballykelly11 mi
- Carndonagh12 mi
- Portrush13 mi
- Coleraine13 mi
- Muff14 mi
Greencastle at a glance
- Town or city of about 817 people. Coordinates: 55.200° N, 6.983° W.
- It is 19 mi east of Buncrana, the main place in Donegal. The sun rises 2 min earlier and sets 2 min earlier than in Buncrana.
- The nearest tide station, Portrush, is 13 mi to the east.
- Its coast faces east.
- Beaches and harbors nearby: Kinnagoe Bay (4.1 mi), Benone Beach (4.8 mi).
Questions about GreencastleQuestions
What time is high tide today in Greencastle?
Today in Greencastle there are high tides at 7:23 am (5.8 ft) and 7:50 pm (5.8 ft) and low tides at 1:02 am and 1:30 pm. Tide coefficient 108.
What time is sunset today in Greencastle?
At 4:59 pm. There is light until the end of civil twilight, at 5:37 pm.
What time is sunrise tomorrow in Greencastle?
At 7:26 am. First light comes at 6:05 am.
What phase is the moon today?
Waning gibbous, 92% illuminated. New moon on Mon, Nov 9 · 7:03 am.
When are the next spring tides?
From October 26 to 28, together with the lunar perigee: they will be stronger than usual.
What are today's solunar periods?
Major 12:51–2:51 am, Minor 10:43–11:43 am, Major 1:22–3:22 pm, Minor 4:55–5:55 pm. Today's activity is high.
What's the weather like today in Greencastle?
Light rain, from 50 °F to 56 °F, with a light breeze from the south (7 mph) and a 100% chance of rain.
How is the sea today in Greencastle?
Slight (Douglas 3): 4.1 ft waves with a period of 9.9 s from the northwest. The water is 52.3 °F.
When is the best time to visit Greencastle?
The best time to visit Greencastle is from June to August: highs of 61 °F to 63 °F, about 14 rainy days a month and 5 hours of sunshine a day.
Can I use this data for navigation?
No. These are predictions for fishing and leisure; for navigation, use the official publications.
Where this data comes from
Tide: Portrush tide gauge (UK National Tide Gauge Network). This uses Environment Agency tide gauge data from the real-time data API (Beta), under the Open Government Licence v3.0; constants fitted by TidePlanet from a year of its readings. Sun and moon: our own calculation with astronomy-engine. Places: GeoNames (CC BY 4.0). Coastline: © OpenStreetMap contributors (ODbL).