Sperlonga tides today
- Tide now 1.2 ft ↑ rising · high 11:05 am (1.3 ft)
- Best time to fish 4:30–5:30 pm average day · 6/10
- Beach day 12:00–5:00 pm Good beach day · 7/10
- Waves · water 0.3 ft · 71 °F calm (rippled) · 4.5 s from the southwest
- Wind · air 2 mph · 65 °F from the SW, gusts 3 · clear sky
- Sun 6:34 am–5:06 pm 10 h 32 min of daylight
- Moon 85% · 7:24 pm waning gibbous · rises at 7:24 pm
- Best time to dive 10:10 am–12:00 pm great day · 10/10
Today in Sperlonga there are high tides at 11:05 am (1.3 ft) and 11:05 pm (1.1 ft) and low tides at 4:25 am and 4:54 pm. Tide coefficient 87. Right now the tide is rising toward the high tide at 11:05 am. The sun rises at 6:34 am and sets at 5:06 pm: 10 h 32 min of daylight. The moon is 85% illuminated (waning gibbous) and rises at 7:24 pm. Major solunar periods run from 1:29 am to 3:29 am and from 2:01 pm to 4:01 pm. The next spring tides arrive from November 9 to 11. The sea is calm (rippled), with 0.3 ft waves. There's a light air from the southwest (2 mph). Clear sky, 65 °F.
Fishing in Sperlonga today
Best time to fish
Solunar activity today: medium- Low tide at 4:54 pm
- Sunset at 5:06 pm, golden hour from 4:27 pm
- Steady pressure (30.09 inHg), almost no wind and calm sea (0.3 ft waves)
- Waning gibbous: a bit more activity than at the quarters
- Highest tide coefficient today: 87 (average tides)
Your day at a glance
The best window, 4:30 pm to 5:30 pm, combines the 4:54 pm low tide and sunset. Also good from 10:10 am to 11:10 am, with the 11:05 am high tide and moonset.
Species with the most records nearby: white seabream, common two-banded seabream, salema and striped red mullet. What you can catch
Beach day in Sperlonga
Is it a beach day?
6 good hours- Sunny
- Onshore breeze (5 mph)
- Calm for swimming: 0.3 ft waves
- Water at 71 °F (nice)
- Low tide at 4:54 pm: more sand
- Feels like 66 °F: a bit cool
Today, hour by hour
- Swimming Calm · 0.3 ft
0.3 ft waves: calm for swimming. Low rip current risk. Always follow the lifeguard's flags.
- Water 71 °F
Nice for swimming.
- Sun & sunscreen UV 3 · SPF 15
Max UV 3 (low): SPF 15 sunscreen.
- Wind 5 mph
Onshore breeze (5 mph).
- Tide & sand 4:54 pm
Low tide at 4:25 am and 4:54 pm: that's when there's the most sand. High tide at 11:05 am and 11:05 pm.
The best window, 12:00 pm to 5:00 pm, brings sunshine, little wind, a calm sea, water at 71 °F and low tide at 4:54 pm, though with cool air.
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 Sperlonga
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- Spiaggia di Levante 0.6 mi · SE
- Parking
Excellent water quality 2025 season, EEA
- Spiaggia di Ponente 0.8 mi · NW
- Parking
Excellent water quality 2025 season, EEA
- Anthropoohagus 1.5 mi · SE
- Parking
Excellent water quality 2025 season, EEA
- Capratica 2.5 mi · NW
- Showers
- Parking
Excellent water quality 2025 season, EEA
- Cala Cetarola 2.6 mi · SE
Excellent water quality 2025 season, EEA
- Sant'Agostino 3.7 mi · SE
- Parking
Excellent water quality 2025 season, EEA
- San Vito 4.8 mi · SE
- Parking
Excellent water quality 2025 season, EEA
- Arenauta 5.5 mi · SE
- Parking
Excellent 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 Italian Ministry of Health (Portale Acque).
Webcams near Sperlonga
Webcams provided by windy.com — add a webcam
Tides in Sperlonga
Today's high and low tides
- ▼ Low tide 4:25 am 0.1 ft
- ▲ Next high tide 11:05 am 1.3 ft · coef. 87
- ▼ Low tide 4:54 pm 0.3 ft
- ▲ High tide 11:05 pm 1.1 ft · coef. 81
↑ Rising The tide is rising. 1 h 6 min to high tide at 11:05 am.
Tide coefficient 87 for the 11:05 am high tide and 81 for the 11:05 pm high tide. Average coefficient. The water rises and falls 1.1 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 October 25 (1.3 ft) and the lowest, on February 19 (-0.3 ft).
Semidiurnal: two high and two low tides a day, of similar height.
Heights above MLWS. Astronomical prediction: wind and air pressure can raise or lower the water by a few inches, and more in a storm. Not for navigation. MLWS
Tide coefficient and range in October
The biggest tides of the month came from October 26 to 27 (coefficient 103, 1.2 ft range). The smallest, from October 18 to 19 (coefficient 29, 0.5 ft).
Tide and solunar table · this week
| Day | Sun | Tide 1 | Tide 2 | Tide 3 | Tide 4 | Coef. | Moon | Major periods | Activity |
|---|---|---|---|---|---|---|---|---|---|
| Today, Thu 29 | 6:34 am · 5:06 pm | Low tide 4:25 am · 0.1 ft | High tide 11:05 am · 1.3 ft | Low tide 4:54 pm · 0.3 ft | High tide 11:05 pm · 1.1 ft | Coef. 87 | 85% | Major periods 1:29 am · 2:01 pm | Medium |
| Fri 30 | 6:35 am · 5:04 pm | Low tide 5:07 am · 0.2 ft | High tide 12:02 pm · 1.2 ft | Low tide 5:53 pm · 0.4 ft | High tide 11:57 pm · 1.0 ft | Coef. 73 | 76% | Major periods 2:34 am · 3:06 pm | Medium |
| Sat 31 | 6:36 am · 5:03 pm | Low tide 5:58 am · 0.3 ft | High tide 1:07 pm · 1.2 ft | Low tide 7:08 pm · 0.5 ft | — | Coef. 58 | 66% | Major periods 3:37 am · 4:07 pm | Medium |
| Sun 1 | 6:37 am · 5:02 pm | High tide 1:01 am · 0.9 ft | Low tide 7:05 am · 0.4 ft | High tide 2:20 pm · 1.2 ft | Low tide 8:51 pm · 0.5 ft | Coef. 53 | Last quarter | Major periods 4:36 am · 5:04 pm | Medium |
| Mon 2 | 6:39 am · 5:01 pm | High tide 2:27 am · 0.9 ft | Low tide 8:45 am · 0.4 ft | High tide 3:33 pm · 1.2 ft | Low tide 10:28 pm · 0.5 ft | Coef. 48 | 43% | Major periods 5:30 am · 5:55 pm | Medium |
| Tue 3 | 6:40 am · 4:59 pm | High tide 4:10 am · 0.9 ft | Low tide 10:18 am · 0.4 ft | High tide 4:38 pm · 1.2 ft | Low tide 11:31 pm · 0.4 ft | Coef. 54 | 33% | Major periods 6:20 am · 6:43 pm | Medium |
| Wed 4 | 6:41 am · 4:58 pm | High tide 5:29 am · 0.9 ft | Low tide 11:19 am · 0.4 ft | High tide 5:35 pm · 1.2 ft | — | Coef. 64 | 23% | Major periods 7:06 am · 7:28 pm | Medium |
▲ high tide · ▼ low tide · heights above MLWS. Major periods: start time; they last 2 hours. Activity: based on the moon phase and the solunar periods.
Where this tide comes from
Sperlonga has no station of its own, so we use the tide at Gaeta (TICON-4), 8.8 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: 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 Sperlonga
Sea stateSea state: calm (rippled)
The waves you may find
- Most commonMost common0.1 ft
- Significant0.3 ft
- Highest expectedHighest0.6 ft
One wave in seven is higher than the significant height, and about 3 times a day one reaches 0.6 ft. Before heading out, expect waves of up to 0.6 ft.
Wind on the coast and offshore
Cross-onshore wind. The coast faces south and the wind comes in from the sea at an angle: a bit more surf at the shore and drift along the coast, toward land.
Wave height, next 7 daysWaves, next 7 days
Waves build over the next few days. The biggest waves arrive on Monday 2: 1.9 ft with a period of 6 s, from the west-northwest (slight).
Water temperature
Water temperature →Water temperature changes how fish behave: in very cold or very warm water they feed less. The water cools over the next few days: about 69.2 °F by Wednesday 4.
Water warmer than normal for late October (+1.7 °F).
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 9:59 am (local time).
Nearest buoy
This is a real measurement of the sea, not a forecast. Data via the E.U. Copernicus Marine Service. Generated using E.U. Copernicus Marine Service Information (doi:10.48670/moi-00036).
Surf in Sperlonga today
Surf today
Flat- Barely any waves (0.4 ft sets): flat
- Almost no wind (3 mph): glassy water
- First or last light of the day
- Rising tide (high tide at 11:05 am)
It’s flat today: almost no waves reach this coast.
- Light: First light 6:05 am · sunrise 6:34 am · sunset 5:06 pm · last light 5:34 pm
- Tide: low 4:25 am (0.1 ft), high 11:05 am (1.3 ft), low 4:54 pm (0.3 ft) and high 11:05 pm (1.1 ft). Every break has its own tide: some work at low tide and others at high tide. The tide doesn’t change the score here.
- Water at 70.7 °F: a springsuit or a 2 mm fullsuit.
- Energy: 0 kJ · Low power
Today’s surf at a glance
The best window, 6:05 am to 10:00 am, has glassy water, though with barely any waves.
An estimate for this stretch of coast, not for a specific break: every beach or reef works its own way (its tide, bottom and angle). Check it when you get there.
Follow the flags and the lifeguards, and don’t paddle out if the surf is above your level: this score is a guide, not a substitute for what you see when you get there.
Diving in Sperlonga today
Diving and snorkeling today
Likely visibility: good- Slack water around high tide (11:05 am): little current from 10:40 am to 11:20 am
- 0.3 ft swell at 4 s from the southwest: barely any surge
- Almost no wind
- 0.0 mph current toward the east, weak (model)
- Sun high: more light underwater
- Slack water today: low tide 4:25 am (4:00–4:50 am), high tide 11:05 am (10:40–11:20 am), low tide 4:54 pm (4:30–5:20 pm) and high tide 11:05 pm (10:40–11:30 pm)
- Likely visibility: good. The sea has been calm and there's been little rain. Based on the last 24 hours of data.
- Water at 70.7 °F: a 5 mm wetsuit.
- Snorkeling: good, calm sea and light wind.
- Night dive: dark from 5:34 pm. Waning gibbous (85%), rising at 7:24 pm: a bright night.
Your diving day at a glance
The best window, 10:10 am to 12:00 pm, combines slack water at high tide, little swell, light wind, weak current and the sun high. Also good from 4:10 pm to 5:10 pm, with slack water at low tide, little swell, light wind and weak current.
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
- Wreck 7.3 mi
- Wreck 7.4 mi
- Wreck 7.5 mi
- Wreck 7.5 mi
- Oasi blu di Villa Tiberio 1.8 mi
- Oasi blu di Monte Orlando 8.4 mi
- Sperlonga Diving Center 0.3 mi
- Diving Riviera di Ulisse - Formia, Gaeta, Scauri, Sperlonga 0.4 mi
- Marem Scuola Subacquea Gaeta 4.1 mi
- Ciaramaglia Nautica - Pesca, Sub & Abbigliamento 7.3 mi
- Gaeta Scuba Diving 8.4 mi
- Neptun Uss 8.5 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 Sperlonga
Now in Sperlonga
- Low / high
- 61 / 67 °F
- Rain
- 0.00 in · 2%
- Clouds
- 0%
- Humidity
- 53%
- Dew pointDew point
- 48 °F
- Visibility
- 26 mi
- UV indexUV
- 2 · low
- Air qualityAir
- Fair · 31
- 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 (+0.03 inHg in 3 hours). Over the next 48 hours: −0.05 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 | Partly cloudy | Mainly clear | Partly cloudy | Clear sky | Clear sky | Clear sky | Mainly clear | Partly cloudy |
| Temperature | 62° | 61° | 61° | 64° | 67° | 67° | 65° | 63° |
| Wind (mph) | 3 NE | 3 NNE | 3 NNE | 0 W | 5 WSW | 5 WSW | 3 NW | 3 NE |
| Gusts | 5 | 4 | 4 | 3 | 10 | 9 | 5 | 5 |
| Waves | 0.4 ft | 0.3 ft | 0.3 ft | 0.3 ft | 0.3 ft | 0.3 ft | 0.3 ft | 0.3 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 am 64° 0 W 0.3 ft
- 12:00 pm 67° 5 WSW 0.3 ft
- 3:00 pm 67° 5 WSW 0.3 ft
- 6:00 pm 65° 3 NW 0.3 ft
- 9:00 pm 63° 3 NE 0.3 ft
- 12:00 am 63° 4 E 0.3 ft
- 3:00 am 61° 4 N 0.4 ft
- 6:00 am 61° 3 NE 0.5 ft
Next 14 daysComing days
| Day | Sky | Low / high | Max wind | Max wave | High tides |
|---|---|---|---|---|---|
| Today · 29 | 61 / 67 °F | 5 mph NNW | 0.4 ft | 11:05 am · 11:05 pm | |
| Fri 30 | 61 / 66 °F | 4 mph ENE | 0.5 ft | 12:02 pm · 11:57 pm | |
| Sat 31 | 59 / 67 °F | 4 mph NNE | 0.5 ft | 1:07 pm | |
| Sun 1 | 56 / 61 °F | 5 mph NNE | 0.5 ft | 1:01 am · 2:20 pm | |
| Mon 2 | 55 / 63 °F | 5 mph NW | 1.9 ft | 2:27 am · 3:33 pm | |
| Tue 3 | 52 / 64 °F | 6 mph E | 1.9 ft | 4:10 am · 4:38 pm | |
| Wed 4 | 55 / 65 °F | 7 mph E | 1.1 ft | 5:29 am · 5:35 pm | |
| Thu 5 | 55 / 65 °F | 6 mph ENE | 1.2 ft | 6:24 am · 6:24 pm | |
| Fri 6 | 55 / 65 °F | 9 mph ENE | 1.4 ft | 7:08 am · 7:07 pm | |
| Sat 7 | 55 / 66 °F | 9 mph NE | 1.7 ft | 7:47 am · 7:46 pm | |
| Sun 8 | 54 / 66 °F | 8 mph NE | 1.2 ft | 8:24 am · 8:23 pm | |
| Mon 9 | 51 / 65 °F | 6 mph NNE | 0.8 ft | 8:58 am · 8:57 pm | |
| Tue 10 | 51 / 63 °F | 4 mph NE | 0.7 ft | 9:31 am · 9:30 pm | |
| Wed 11 | 49 / 60 °F | 3 mph ENE | 1.0 ft | 10:05 am · 10:03 pm |
- Fri 30 Overcast 61° / 66° 0.5 ft
- Sat 31 Overcast 59° / 67° 0.5 ft
- Sun 1 Light rain 56° / 61° 0.5 ft
- Mon 2 Light rain 55° / 63° 1.9 ft
- Tue 3 Overcast 52° / 64° 1.9 ft
- Wed 4 Partly cloudy 55° / 65° 1.1 ft
- Thu 5 Overcast 55° / 65° 1.2 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 Partly agree · medium confidence: unsure about rain on Saturday 31. See the models →
- Outlook Next few weeks, compared with normal: normal temperatures, normal rain and a slightly cooler sea. See the outlook →
- Normal Today, normal highs for late October (67 °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 9:59 am (local time).
The sun in Sperlonga
Sunrise and sunset
- First light 5:33 am
- Full dark 6:06 pm
- Civil dawn 6:05 am
- Civil dusk 5:34 pm
- Solar noon 11:50 am (35° high)
- Daylight 10 h 32 min (−2 min)
- Evening golden hour 4:27 pm
- Full dark 6:06 pm
Golden hour and the day-night map
Today the sun is 92,336,452 mi away and looks 32′ 11″ across.
The moon in Sperlonga
Moon phase and position
Today the moon is 226,618 mi away and looks 32′ 45″ across.
Solunar periods
Today's activity: medium- 1:29–3:29 am Major · the moon passes overhead · high activity
- 2:01–4:01 pm Major · the moon passes underfoot · high activity
- 10:09–11:09 am Minor · moonset · medium activity
- 6:54–7:54 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 · 9:29 pmNov 1 in 3 days
- New moon Mon, Nov 9 · 8:03 amNov 9 in 11 days
- First quarter Tue, Nov 17 · 12:48 pmNov 17 in 19 days
- Full moon Tue, Nov 24 · 3:54 pmNov 24 in 26 days
Next perigee (the moon at its closest to Earth): November 25, 223,281 mi away.
Where to fish in Sperlonga
Piers, ramps and tackle shops nearby
Map: OpenFreeMap · © OpenMapTiles · © OpenStreetMap contributors
- Jetty 0.4 mi
- Jetty 7.7 mi
- Jetty 8.1 mi
- Jetty 8.4 mi
- Boat ramp 7.4 mi
- Boat ramp 7.4 mi
- Boat ramp 7.5 mi
- Formia 9.3 mi
- Peschiera Scurzone 7.6 mi
- Illiano Pesca 7.6 mi
- Fuel dock 0.4 mi
- La Rocca Nautico 7.9 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
Gentle slopeThe bottom slopes gently: 16 ft deep 0.4 mi from shore and 33 ft at 0.5 mi. It reaches 164 ft at 1.4 mi.
From the shoreline (750 ft from Sperlonga) out to sea, heading south.
How far from shore
- 16 ft deep0.4 mi
- 33 ft deep0.5 mi
- 66 ft deep0.7 mi
- 164 ft deep1.4 mi
For fishing, swimming and diving
- Shore fishing. Shallow, gradual bottom (16 ft at 0.4 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. Shore diving works here: 33 ft at 0.5 mi and 66 ft at 0.7 mi from shore.
Rough estimate: here the data comes in cells of about 0.3 mi and misses details near shore (rocks, sandbars, small coves).
Source: EMODnet Bathymetry DTM 2024, here using the GEBCO grid (CC BY 4.0), cells of about 0.3 mi; depth at the lowest astronomical tide. For reference only: not for navigation or anchoring.
Tides near SperlongaTides nearby
- Gaeta7.8 mi
- Formia9.1 mi
- Terracina10 mi
- Penitro14 mi
- Minturno16 mi
- San Felice Circeo18 mi
- Molella19 mi
- Sabaudia21 mi
- Bella Farnia25 mi
- Mondragone26 mi
Sperlonga at a glance
- Town or city of about 3,008 people. Coordinates: 41.259° N, 13.433° E.
- It is 42 mi east of Nettuno, the main place in Lazio. The sun rises 3 min earlier and sets 3 min earlier than in Nettuno.
- The nearest tide station, Gaeta, is 8.8 mi to the southeast.
- Its coast faces south.
- Beaches and harbors nearby: Spiaggia delle Bambole (2.7 mi), Spiaggia Summit (4.8 mi).
Questions about SperlongaQuestions
What time is high tide today in Sperlonga?
Today in Sperlonga there are high tides at 11:05 am (1.3 ft) and 11:05 pm (1.1 ft) and low tides at 4:25 am and 4:54 pm. Tide coefficient 87.
What time is sunset today in Sperlonga?
At 5:06 pm. There is light until the end of civil twilight, at 5:34 pm.
What time is sunrise tomorrow in Sperlonga?
At 6:35 am. First light comes at 5:34 am.
What phase is the moon today?
Waning gibbous, 85% illuminated. New moon on Mon, Nov 9 · 8:03 am.
When are the next spring tides?
From November 9 to 11.
What are today's solunar periods?
Major 1:29–3:29 am, Minor 10:09–11:09 am, Major 2:01–4:01 pm, Minor 6:54–7:54 pm. Today's activity is medium.
What's the weather like today in Sperlonga?
Partly cloudy, from 61 °F to 67 °F, with a light air from the southwest (2 mph) and a 2% chance of rain.
How is the sea today in Sperlonga?
Calm (rippled) (Douglas 1): 0.3 ft waves with a period of 4.5 s from the southwest. The water is 70.9 °F.
When is the best time to visit Sperlonga?
The best time to visit Sperlonga is from June to August: highs of 81 °F to 87 °F, about 4 rainy days a month and 11 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: Gaeta 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).