On the beach
Right now
Sample dataIllustrative conditions — the live Open-Meteo marine feed wasn't reachable, so these are deterministic placeholder values that will be replaced automatically once the feed is available.
7-day outlook
Sample dataModeled placeholder forecast for demonstration — will be replaced by a live marine-weather feed.
Sea temperature
Next 7 days, °C
Wave height
Next 7 days, metres
View as table
| Day | Sea temp (°C) | Wave height (m) |
|---|---|---|
| Wed 2 | 24.3 | 0.3 |
| Thu 3 | 23.9 | 0.3 |
| Fri 4 | 23.4 | 0.3 |
| Sat 5 | 23.3 | 0.3 |
| Sun 6 | 23.6 | 0.3 |
| Mon 7 | 24.1 | 0.3 |
| Tue 8 | 24.4 | 0.3 |
Water quality history
Official EEA classification, one rating per bathing season, 2015–2025 — real data reported by national authorities.
- 2015: Not classified2015
- 2016: Not classified2016
- 2017: Not classified2017
- 2018: Excellent2018
- 2019: Excellent2019
- 2020: Excellent2020
- 2021: Excellent2021
- 2022: Excellent2022
- 2023: Excellent2023
- 2024: Excellent2024
- 2025: Excellent2025
Excellent in the most recent season, and 8 of 8 classified years rated Excellent or Good.
- Excellent
- Good
- Sufficient
- Poor
- Not classified
View as table
| Year | Classification |
|---|---|
| 2015 | Not classified |
| 2016 | Not classified |
| 2017 | Not classified |
| 2018 | Excellent |
| 2019 | Excellent |
| 2020 | Excellent |
| 2021 | Excellent |
| 2022 | Excellent |
| 2023 | Excellent |
| 2024 | Excellent |
| 2025 | Excellent |
Typical sea temperature by month
Modeled estimatePlausible seasonal climatology derived from latitude, for illustration — not a measured average.
Monthly sea temperature
Typical range across the year, °C
View as table
| Month | Typical sea temp (°C) |
|---|---|
| Jan | 16 |
| Feb | 15 |
| Mar | 16 |
| Apr | 18 |
| May | 20 |
| Jun | 23 |
| Jul | 25 |
| Aug | 26 |
| Sep | 25 |
| Oct | 23 |
| Nov | 20 |
| Dec | 18 |
Location & nearby beaches
Nearby beaches
- Lac de Saramon15 kmGers
- Lac d'Escapa17 kmGers
- 19 km
- Lac Du Magnoac22 kmHautes-Pyrénées
Distances calculated as straight-line (haversine) from official coordinates.
Getting there & around
- By car: there's parking about ~940 m from the beach.
- Nearest bus stop is about ~1.1 km away.
Food, stays & town
- Nearest village: Seissan, about ~1.2 km away.
- 1 place to stay mapped nearby Closest is Whaka Lodge, Eco-Resort Insolite & Spa, about ~140 m away.
- 1 shop nearby, about ~1.4 km away
What kind of beach is this?
This beach belongs to a small coastal village. It's usually calmer than a resort or town beach, though a popular village spot can still fill up on the best summer days.
Estimated from OpenStreetMap surroundings data (ODbL).
- Water sports
Is the water clean at Lac de Seissan?
Lac de Seissan sits on a stretch of coast classed as a lake bathing site, carrying an official EU Bathing Water rating of Excellent for the 2025 season. Under the EU Bathing Water Directive, national authorities test for intestinal enterococci and E. coli through the season and report the results the following spring — the 2025 rating was published in spring 2026, and 2026's won't follow until spring 2027. In addition to that yearly rating, some national authorities — for Croatia, the national environmental authority — publish individual water sample results during the season itself, ahead of the annual report. It sits in Gers. You can park about ~940 m away.
Looking to avoid the busiest weeks? The water is typically warmest around August, with the most reliable swimming window running July–September; outside that stretch you'll find a cooler sea but a quieter beach. That rating has been consistent: every one of the 8 classified seasons on record has come back Excellent or Good. On site you'll find Sports facilities. Seissan — the closest town — sits about ~1.2 km from here.
“Excellent” is one point on a four-step scale — Excellent, Good, Sufficient or Poor — assigned once per year from that season's water samples, not a live reading. It describes how the site performs on average across the season, not the exact water quality this afternoon; for day-to-day sea conditions, see the “Right now” and 7-day outlook panels above.
Frequently asked questions
Can you safely swim at Lac de Seissan?
It's about as safe as bathing water gets: Lac de Seissan's 2025 EU rating is Excellent, the top tier on the scale, and 8 of 8 classified seasons have come back Excellent or Good. It's also held steady at Excellent for 8 straight years.
How warm is the sea at Lac de Seissan right now?
That's placeholder data, not a live measurement: Lac de Seissan's marine-weather feed couldn't be reached, so the panel above is showing an estimated ~24°C until the real feed comes back. That's the reading right off Gers.
What's the best month to visit Lac de Seissan for swimming?
July–September tends to be the sweet spot for swimming here, with sea temperatures usually peaking later in that stretch. That applies to the water around Gers.
How is the water quality rating measured?
National authorities sample the water for intestinal enterococci and E. coli bacteria through the bathing season and report the full-season results to the European Environment Agency each spring for the season just finished, which assigns one of four annual classifications — Excellent, Good, Sufficient or Poor — under the EU Bathing Water Directive. Some national authorities, including Croatia's IZOR, also publish individual in-season sample results ahead of that annual report.
How do I get to Lac de Seissan without a car?
By car, there's parking about ~940 m from the beach. There's a bus stop about ~1.1 km from the beach. The nearest town is Seissan, about ~1.2 km away.