Mount Merrion tides today
- Tide now 7.3 ft ↑ rising · high 12:51 am (13.7 ft)
- Best time tomorrow 6:40–7:30 am good day · 7/10
- Beach day Not today Not a beach day · 0/10
- Waves · water 1.0 ft · 54 °F smooth · 4.2 s from the south-southeast
- Wind · air 3 mph · 53 °F from the SSE, gusts 6 · overcast
- Sun 7:16 am–5:01 pm 9 h 45 min of daylight
- Moon 92% · 5:38 pm waning gibbous · rises at 5:38 pm
- Diving tomorrow 11:30 am–2:10 pm great day · 10/10
Today in Mount Merrion there are high tides at 12:03 am (14.0 ft) and 12:30 pm (13.7 ft) and low tides at 5:48 am and 6:11 pm. Tide coefficient 91. Right now the tide is rising toward the high tide at 12:51 am. The sun rises at 7:16 am and sets at 5:01 pm: 9 h 45 min of daylight. The moon is 92% illuminated (waning gibbous) and rises at 5:38 pm. Major solunar periods run from 12:48 am to 2:48 am and from 1:19 pm to 3:19 pm. The next spring tides arrive from October 26 to 28. The sea is smooth, with 1.0 ft waves. There's a light air from the south-southeast (3 mph). Overcast, 53 °F.
Fishing in Mount Merrion today
Best time to fish
Solunar activity today: high- Low tide at 6:11 pm
- Minor period 5:08–6:08 pm (moonrise)
- Sunset at 5:01 pm, golden hour from 4:10 pm
- Rising pressure (+0.34 inHg in 24 h), almost no wind and calm sea (1.0 ft waves)
- Waning gibbous: a bit more activity than at the quarters
- Highest tide coefficient today: 91 (spring tides)
- A minor period lines up with sunset
Your day at a glance
The best window, 5:10 pm to 6:10 pm, combines the 6:11 pm low tide, moonrise and sunset, though with rising pressure.
Species with the most records nearby: small-spotted catshark, European plaice, whiting and haddock. October is one of the months when these are seen most: Atlantic mackerel and common sole. What you can catch
Beach day in Mount Merrion
Is it a beach day?
- Calm for swimming: 1.2 ft waves
- Cloudy (98% cloud cover)
- Feels like 55 °F: chilly for the beach
- Light offshore wind (12 mph): it blows floats and inflatables out to sea
- Water at 54 °F (very cold)
- High tide at 12:30 pm, coefficient 90: little sand left
Today, hour by hour
- Swimming Calm · 1.2 ft
1.2 ft waves: calm for swimming. Low rip current risk. Always follow the lifeguard's flags.
- Water 54 °F
Very cold: ease in and keep swims short.
- Sun & sunscreen UV 1 · SPF 15
Max UV 1 (low): SPF 15 sunscreen.
- Wind 12 mph
Offshore breeze (12 mph). Watch floats and inflatables: offshore wind carries them out to sea.
- Tide & sand 5:48 am
Low tide at 5:48 am and 6:11 pm: that's when there's the most sand. High tide at 12:03 am and 12:30 pm. Coefficient 91 (spring tides): little sand left at high tide.
The EPA Ireland (beaches.ie) issues its bathing notices in season, from 1 June to 15 September; none are in force now. We don't have data on jellyfish or sargassum: ask the lifeguard or check the flags. How it works · The next 7 days
Beaches near Mount Merrion
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- Merrion Strand 1.2 mi · N
- Parking
- No dogs
- Sandymount Strand 2.0 mi · N
- Restrooms
- Parking
- Dogs on leash
Sufficient water quality 2025 season, EEA
- Seapoint 2.3 mi · E
- Lifeguard
- Restrooms
- Parking
- No dogs
Excellent water quality 2025 season, EEA
- The Shelly Banks (part of) 2.7 mi · N
- Parking
- Sandycove Beach 4.2 mi · E
- Lifeguard
- Restrooms
- Showers
- Parking
- No dogs
Good water quality 2025 season, EEA
- White Rock Beach 5.1 mi · SE
- Restrooms
- Dogs on leash
- Nudity allowed
Excellent water quality 2025 season, EEA
- Killiney Beach 5.2 mi · SE
- Lifeguard
- Restrooms
- Parking
- Wheelchair access
Excellent water quality 2025 season, EEA
- Dollymount Strand 5.6 mi · NE
- Lifeguard
- Restrooms
- Showers
- Parking
- No dogs
Good water quality 2025 season, EEA
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.
Webcams near Mount Merrion
Webcams provided by windy.com — add a webcam
Tides in Mount Merrion
Today's high and low tides
- ▲ High tide 12:03 am 14.0 ft · coef. 91
- ▼ Low tide 5:48 am 2.0 ft
- ▲ High tide 12:30 pm 13.7 ft · coef. 90
- ▼ Low tide 6:11 pm 2.0 ft
↑ Rising The tide is rising. 3 h 56 min to high tide at 12:51 am.
Tide coefficient 91 for the 12:03 am high tide and 90 for the 12:30 pm high tide. Spring tides. The water rises and falls 12.0 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 December 27 (14.9 ft) and the lowest, on August 14 (0.9 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 29 (coefficient 91, 12.0 ft range). The smallest, on October 19 (coefficient 38, 4.9 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 | 7:16 am · 5:01 pm | High tide 12:03 am · 14.0 ft | Low tide 5:48 am · 2.0 ft | High tide 12:30 pm · 13.7 ft | Low tide 6:11 pm · 2.0 ft | Coef. 91 | 92% | Major periods 12:48 am · 1:19 pm | High |
| Thu 29 | 7:18 am · 4:59 pm | High tide 12:51 am · 13.7 ft | Low tide 6:30 am · 2.4 ft | High tide 1:17 pm · 13.6 ft | Low tide 6:59 pm · 2.3 ft | Coef. 89 | 85% | Major periods 1:51 am · 2:24 pm | Medium |
| Fri 30 | 7:20 am · 4:57 pm | High tide 1:46 am · 13.3 ft | Low tide 7:18 am · 3.1 ft | High tide 2:11 pm · 13.3 ft | Low tide 7:53 pm · 2.7 ft | Coef. 82 | 76% | Major periods 2:56 am · 3:28 pm | Medium |
| Sat 31 | 7:21 am · 4:55 pm | High tide 2:49 am · 12.7 ft | Low tide 8:12 am · 3.9 ft | High tide 3:11 pm · 13.0 ft | Low tide 8:57 pm · 3.3 ft | Coef. 74 | 65% | Major periods 3:59 am · 4:29 pm | Medium |
| Sun 1 | 7:23 am · 4:53 pm | High tide 3:58 am · 12.1 ft | Low tide 9:16 am · 4.8 ft | High tide 4:20 pm · 12.7 ft | Low tide 10:11 pm · 3.8 ft | Coef. 64 | Last quarter | Major periods 4:58 am · 5:25 pm | Medium |
| Mon 2 | 7:25 am · 4:51 pm | High tide 5:15 am · 11.7 ft | Low tide 10:33 am · 5.4 ft | High tide 5:36 pm · 12.6 ft | Low tide 11:35 pm · 3.9 ft | Coef. 57 | 43% | Major periods 5:51 am · 6:17 pm | Medium |
| Tue 3 | 7:27 am · 4:49 pm | High tide 6:33 am · 11.7 ft | Low tide 11:59 am · 5.5 ft | High tide 6:51 pm · 12.7 ft | — | Coef. 59 | 32% | Major periods 6:41 am · 7:04 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
Tides from the Dublin Port station (TICON-4), 3.2 mi from Mount Merrion. Times and heights are its predictions.
Station data attribution: Slackwater database (https://github.com/openwatersio/slackwater-database). Source: Hart-Davis, M., Dettmering, D., Seitz, F. (2025), TICON-4: TIdal CONstants based on GESLA-4 sea-level records, SEANOE, https://doi.org/10.17882/109129. Licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Modified: see https://github.com/openwatersio/slackwater-database#modifications-to-source-data
The sea at Mount Merrion
Sea stateSea state: smooth
The waves you may find
- Most commonMost common0.5 ft
- Significant1.0 ft
- Highest expectedHighest2.2 ft
One wave in seven is higher than the significant height, and about 3 times a day one reaches 2.2 ft. Before heading out, expect waves of up to 2.2 ft.
Wind on the coast and offshore
Cross-shore wind. The coast faces east and the wind blows along the shore: drift and current run parallel to the beach.
Wave height, next 7 daysWaves, next 7 days
Waves build over the next few days. The biggest waves arrive on Friday 30: 3.5 ft with a period of 4 s, from the south-southeast (slight).
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 8:55 pm (local time).
Nearest buoy
This is a real measurement of the sea, not a forecast. Data from Marine Institute, via the E.U. Copernicus Marine Service. Generated using E.U. Copernicus Marine Service Information (doi:10.48670/moi-00036).
Diving in Mount Merrion today
Diving and snorkeling today
Likely visibility: good- Slack water around high tide (12:30 pm): little current from 11:50 am to 1:00 pm
- 1.2 ft swell at 4 s from the south-southeast: barely any surge
- Light offshore wind (11 mph)
- 0.2 mph current toward the north-northeast, weak (model)
- Sun high: more light underwater
- Slack water today: high tide 12:03 am (11:30 pm–12:30 am), low tide 5:48 am (5:30–6:03 am), high tide 12:30 pm (11:50 am–1:00 pm) and low tide 6:11 pm (5:50–6:30 pm)
- Likely visibility: good. Swell (up to 3.0 ft at 6 s) over the last few days has stirred up the water. Based on the last 24 hours of data.
- Water at 54.0 °F: a 7 mm semi-dry suit, with hood, gloves and booties.
- Snorkeling: good, calm sea and light wind.
- Night dive: dark from 5:37 pm. Waning gibbous (92%), rising at 5:38 pm: a bright night.
Your diving day at a glance
The best window, 11:00 am to 1:30 pm, combines slack water at high tide, little swell, light wind, weak current and the sun high.
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
- Flying Hawk 5.3 mi
- Loch Fergus 5.8 mi
- HMS Guide Me II 6.9 mi
- Queen Victoria 7.7 mi
- South Dublin Bay Special Area of Conservation 2.0 mi
- North Bull Island Special Protection Area 5.8 mi
- UCD Sub Aqua Club 1.0 mi
- WreckDiving-Training Center 2.9 mi
- Oceandivers 3.0 mi
- Irish Underwater Council 3.2 mi
- Irish Sub Aqua Club 3.7 mi
- Flagship Scubadiving Ltd 4.1 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 Mount Merrion
Now in Mount Merrion
- Low / high
- 52 / 59 °F
- Rain
- 0.00 in · 29%
- Clouds
- 100%
- Humidity
- 90%
- Dew pointDew point
- 49 °F
- Visibility
- 13 mi
- UV indexUV
- 0 · low
- Air qualityAir
- Fair · 26
- Saharan dust
- No
- Pollen
- None
Pressure and fishing
- ↗ RisingRising Anglers say fish bite less for a while
- → SteadySteady · now Anglers expect normal activity
- ↘ FallingFalling Anglers say fish feed more before the change
Steady now (+0.01 inHg in 3 hours). Over the next 48 hours: +0.12 inHg. Steady pressure: anglers expect normal activity. 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 | Overcast | Overcast | Overcast | Overcast | Overcast | Mainly clear | Overcast |
| Temperature | 52° | 55° | 56° | 55° | 58° | 59° | 56° | 52° |
| Wind (mph) | 13 SW | 17 SW | 14 WSW | 10 WSW | 11 WSW | 8 WSW | 2 SW | 3 SSE |
| Gusts | 29 | 34 | 30 | 25 | 23 | 18 | 9 | 6 |
| Waves | 1.8 ft | 2.2 ft | 2.2 ft | 1.7 ft | 1.4 ft | 1.2 ft | 1.0 ft | 1.0 ft |
| Rain | 0.00 in | 0.00 in | 0.00 in | 0.00 in | 0.00 in | 0.00 in | 0.00 in | 0.00 in |
- 9:00 pm 52° 3 SSE 1.0 ft
- 12:00 am 51° 2 SSW 1.1 ft
- 3:00 am 50° 3 SSE 1.2 ft
- 6:00 am 50° 3 SSE 1.2 ft
- 9:00 am 53° 6 SE 1.4 ft
- 12:00 pm 58° 8 SSE 2.2 ft
- 3:00 pm 57° 8 SSE 2.8 ft
- 6:00 pm 56° 9 SE 3.0 ft
Next 14 daysComing days
| Day | Sky | Low / high | Max wind | Max wave | High tides |
|---|---|---|---|---|---|
| Today · 28 | 52 / 59 °F | 18 mph WSW | 2.2 ft | 12:03 am · 12:30 pm | |
| Thu 29 | 49 / 58 °F | 12 mph SSE | 3.1 ft | 12:51 am · 1:17 pm | |
| Fri 30 | 52 / 58 °F | 12 mph SSE | 3.5 ft | 1:46 am · 2:11 pm | |
| Sat 31 | 46 / 57 °F | 4 mph SSW | 1.6 ft | 2:49 am · 3:11 pm | |
| Sun 1 | 48 / 53 °F | 5 mph WNW | 1.7 ft | 3:58 am · 4:20 pm | |
| Mon 2 | 47 / 54 °F | 8 mph E | 1.8 ft | 5:15 am · 5:36 pm | |
| Tue 3 | 46 / 53 °F | 8 mph ESE | 1.6 ft | 6:33 am · 6:51 pm | |
| Wed 4 | 49 / 53 °F | 7 mph ESE | 2.2 ft | 7:45 am · 7:59 pm | |
| Thu 5 | 48 / 52 °F | 10 mph ESE | 2.6 ft | 8:45 am · 8:57 pm | |
| Fri 6 | 47 / 51 °F | 11 mph ESE | 2.5 ft | 9:34 am · 9:46 pm | |
| Sat 7 | 46 / 51 °F | 9 mph SE | 3.4 ft | 10:14 am · 10:27 pm | |
| Sun 8 | 46 / 54 °F | 10 mph ESE | 2.8 ft | 10:49 am · 11:05 pm | |
| Mon 9 | 53 / 58 °F | 6 mph SE | 3.0 ft | 11:21 am · 11:39 pm | |
| Tue 10 | 51 / 56 °F | 3 mph ESE | 1.2 ft | 11:52 am |
- Thu 29 Overcast 49° / 58° 3.1 ft
- Fri 30 Overcast 52° / 58° 3.5 ft
- Sat 31 Fog 46° / 57° 1.6 ft
- Sun 1 Overcast 48° / 53° 1.7 ft
- Mon 2 Overcast 47° / 54° 1.8 ft
- Tue 3 Light drizzle 46° / 53° 1.6 ft
- Wed 4 Light drizzle 49° / 53° 2.2 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.
- The models They agree · high confidence for the next few days. See the models →
- Outlook Next few weeks, compared with normal: a bit warmer, normal rain and a slightly warmer sea. See the outlook →
- Normal Today, warmer than normal for late October (+3.9 °F; normal high: 55 °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 8:55 pm (local time).
The sun in Mount Merrion
Sunrise and sunset
- First light 5:59 am
- Full dark 6:18 pm
- Civil dawn 6:39 am
- Civil dusk 5:37 pm
- Solar noon 12:09 pm (24° high)
- Daylight 9 h 45 min (−4 min)
- Evening golden hour 4:10 pm
- Full dark 6:18 pm
Golden hour and the day-night map
Today the sun is 92,359,439 mi away and looks 32′ 11″ across.
The moon in Mount Merrion
Moon phase and position
Today the moon is 226,451 mi away and looks 32′ 47″ across.
Solunar periods
Today's activity: high- 12:48–2:48 am Major · the moon passes overhead · high activity
- 1:19–3:19 pm Major · the moon passes underfoot · high activity
- 10:24–11:24 am Minor · moonset · medium activity
- 5:08–6:08 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 Mount Merrion
Piers, ramps and tackle shops nearby
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- Old Pier 3.0 mi
- Public Boatyard 3.0 mi
- Saint Michael's Pier 3.4 mi
- Carlisle Pier 3.5 mi
- Boat ramp 2.3 mi
- Boat ramp 3.0 mi
- Boat ramp 3.0 mi
- Vances Harbour 1.8 mi
- Coal Harbour 2.9 mi
- Conway Angling Craft 1.0 mi
- Rory's Fishing Tackle 3.7 mi
- Fuel dock 8.7 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
Very shallowVery shallow and flat: 3.1 mi from shore the water is still only about 30 ft deep.
From the shoreline (1.3 mi from Mount Merrion) out to sea, heading east.
How far from shore
- 16 ft deep1.7 mi
- 33 ft deepnot within 3.1 mi
- 66 ft deepnot within 3.1 mi
- 164 ft deepnot within 3.1 mi
For fishing, swimming and diving
- Shore fishing. Shallow, gradual bottom (16 ft at 1.7 mi): cast far from the beach and fish the high tide, when there is more water close in.
- Swimming. A very gentle way in with plenty of shallow water, good for kids. At low tide the water can be far out.
- Diving. Shallow: the water doesn't reach 33 ft within 3.1 mi. For deeper dives, take a boat farther out.
Inside bays, estuaries and harbors the bottom changes a lot from spot to spot (channels and shoals): use this only as a rough guide.
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
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North Wall Quay Lighthouse 3.2 mi north
- Light
- A white flash every 2 s · Fl W 2s
- Range
- 10 nautical miles (12 mi)
- Light height
- 39 ft above sea level
- Tower height
- 39 ft
- Built
- 1904
Other lighthouses nearby: North Bank Lighthouse (3.5 mi northeast), Dun Laoghaire West Lighthouse (3.5 mi east).
Light details: NGA List of Lights (USA); the rest from Wikidata. For reference only: not for navigation. Wikidata · Sources and licenses
Tides near Mount MerrionTides nearby
- Booterstown0.7 mi
- Donnybrook1.0 mi
- Clonskeagh1.2 mi
- Milltown1.5 mi
- Blackrock1.5 mi
- Sandyford1.8 mi
- Sandymount2.0 mi
- Monkstown2.6 mi
- Dublin2.7 mi
- Ringsend2.9 mi
Mount Merrion at a glance
- Town or city of about 7,846 people. Coordinates: 53.300° N, 6.215° W.
- It is 3.3 mi west of Dún Laoghaire, the main place in Dún Laoghaire-Rathdown. The sun rises at the same time and sets at the same time than in Dún Laoghaire.
- The nearest tide station, Dublin Port, is 3.2 mi to the north.
- Its coast faces east.
- Beaches and harbors nearby: Merrion Strand (1.2 mi), Sandymount Strand (2.0 mi), Pigeon House Harbour (2.4 mi), Dublin-Ferryport Terminal 1 (3.2 mi).
Questions about Mount MerrionQuestions
What time is high tide today in Mount Merrion?
Today in Mount Merrion there are high tides at 12:03 am (14.0 ft) and 12:30 pm (13.7 ft) and low tides at 5:48 am and 6:11 pm. Tide coefficient 91.
What time is sunset today in Mount Merrion?
At 5:01 pm. There is light until the end of civil twilight, at 5:37 pm.
What time is sunrise tomorrow in Mount Merrion?
At 7:18 am. First light comes at 6:00 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 12:48–2:48 am, Minor 10:24–11:24 am, Major 1:19–3:19 pm, Minor 5:08–6:08 pm. Today's activity is high.
What's the weather like today in Mount Merrion?
Overcast, from 52 °F to 59 °F, with a light air from the south-southeast (3 mph) and a 29% chance of rain.
How is the sea today in Mount Merrion?
Smooth (Douglas 2): 1.0 ft waves with a period of 4.2 s from the south-southeast. The water is 54.3 °F.
When is the best time to visit Mount Merrion?
The best time to visit Mount Merrion is from June to August: highs of 66 °F to 69 °F, about 10 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: Dublin Port station, with constants from TICON-4 (Hart-Davis, Dettmering and Seitz, 2025, SEANOE), licensed CC BY 4.0, via Slackwater database (changes). Sun and moon: our own calculation with astronomy-engine. Places: GeoNames (CC BY 4.0). Coastline: © OpenStreetMap contributors (ODbL).