🌡️ 30 years measured

Peñíscola weather, month by month

Not adjectives: the averages of the full daily series from 1995 to 2024, 10,958 days, with the source and the method stated. And the one figure that spoils the story.

Every destination guide will tell you Peñíscola has a mild Mediterranean climate. That is true and it is useless: it does not tell you whether you can swim in October, when it rains, or how cold the nights get in the shoulder season. So here are the numbers instead. Air temperature and rain days are the averages of the complete daily series over 30 full years, from 1995 to 2024 — 10,958 days — taken from the ERA5 reanalysis archive and aggregated for this page, with the grid point, the period and the consultation date published on the Spanish weather page.

Two honesty notes before the table, because they change how you read it. A rain day is a day with 1 mm or more, which is the World Meteorological Organization threshold: count every day with any measurable drizzle and the numbers double while meaning less. And the sea column is measured too, with one geographic caveat we will not hide: there is no buoy at Peñíscola, so those figures are the mean of the two long measured series that bracket the town — the Puertos del Estado buoys off Valencia and Tarragona, one about 96 km to the south and the other about 103 km to the north, with 19 and 12 years of hourly data. What makes averaging them defensible is that the two agree with each other to within 1.4 °C in every month of the year. It is not Peñíscola’s own water and we do not pretend it is.

The twelve months, measured

Daily highs and lows, sea temperature and rain days. The highlighted row is September, and the next section explains why.

Month	Avg. high	Avg. low	Sea	Rain days
January	14 °C	5 °C	14 °C	5
February	15 °C	6 °C	14 °C	4
March	17 °C	8 °C	14 °C	6
April	19 °C	10 °C	15 °C	7
May	23 °C	13 °C	18 °C	6
June	27 °C	18 °C	22 °C	4
July	29 °C	21 °C	26 °C	2
August	30 °C	21 °C	27 °C	4
September	26 °C	18 °C	26 °C	8
October	23 °C	14 °C	23 °C	7
November	18 °C	9 °C	19 °C	6
December	15 °C	6 °C	16 °C	5

Air and rain: means of the daily ERA5 series, 1995–2024 (10,958 days), computed for this site. A rain day is 1 mm or more. Sea: mean of the Valencia and Tarragona buoys (Puertos del Estado), the two nearest long series, which bracket the town and agree to within 1.4 °C every month — not measured at Peñíscola itself. These are long-term averages, not a forecast — for the actual forecast for your dates, use any live weather service on the day.

The best month to come is also the rainiest

This site argues elsewhere that the best window in Peñíscola is September: the sea still at 26 °C, only one degree below the August peak, with the air down to 26 °C from 30 °C, and the beaches given back to the town. The measured series adds something to that argument that we would rather publish than hide: September is the wettest month of the year, with 8 rain days against the 2 of July.

It does not cancel the recommendation, and here is why. Eight days with 1 mm or more, spread across thirty Septembers, is not eight ruined days: on this coast the autumn rain arrives as short, heavy episodes — the local gota fría — rather than as days of drizzle, and it tends to fall and clear. But it does mean you should not plan a September trip as if it were July. Bring one wet-weather plan, and note which of our pages tell you what is indoors: the castle, the spa circuits and the old town under an umbrella all work.

The mirror image is worth knowing too. July is the driest month by a wide margin, with 2 rain days, and it is also the second hottest. If your priority is a guaranteed dry week and you can take the heat and the crowds, that is your month — and it is the one the whole coast has already booked.

The swimming season is longer than the hot season

This is the pattern that decides shoulder-season trips, and it comes straight from the two temperature columns: the sea stays at 22 °C or above for 5 months, while the air only reaches 25 °C in 4. Water holds heat far longer than air does, so the swimming season runs behind the heat and finishes later.

In practice: in October the sea is at 23 °C, warmer than the 22 °C of June — the month when nobody hesitates to get in — while the air has dropped from 27 °C to 23 °C. So an October trip is not a beach trip minus the beach: the water is there, and what changes is the evening, when you want a jumper. The full case for that month is on our Spanish page for October.

It also explains why an unheated outdoor pool is a summer facility here and not a year-round one. With a mean high of 14 °C in January and the sea at 14 °C, a pool without heating is decoration for much of the year — and in the whole municipality only one heated pool is verified, inside a paid spa circuit. Our pool pages have the property-by-property check.

What the winter is actually like

Mild is not warm, and the numbers are worth having before you book a February break expecting the beach. The coldest month by air is January, at 14 °C by day and 5 °C at night, and the coldest sea is January, February and March at 14 °C. That is a climate for walking the walls, eating rice indoors and having the old town almost to yourself — not for swimming.

It is also worth knowing that the town works differently out of season: a good part of the hotel stock closes or reduces service, and the Gran Hotel Peñíscola itself closes for the winter, which we publish rather than let you discover at the booking stage — the last night of the season is 7 November 2026 and it reopens on 26 February 2027.

Choosing a month, and choosing where to stay in it

If the numbers point you at the shoulder season, the practical question becomes which properties are open and what they have indoors. The Gran Hotel Peñíscola is a four-star on the Playa Norte seafront, 3,806 m from the castle in a straight line, with 4,427 Booking reviews at 8.2/10 (7 August 2026) — the largest volume of reviews in town, which makes its figures the most reliable here rather than the best.

For a month that is not July, two of its features matter more than they would in high season: a spa with the only heated pool this site could verify in Peñíscola — inside the paid water circuit, not the hotel pool — and its own guest shuttle up to the old town in summer and Easter week. Its starting rate is 69 €, and its winter closure is published: 7 November 2026 to 26 February 2027. Booking on the hotel’s own site avoids the commission the platforms charge.

Check dates and rates

Frequently asked questions

What is the best month to visit Peñíscola?

On the measured figures, September: the sea at 26 °C, one degree below the August peak, with the air at 26 °C instead of 30 °C, and the beaches far emptier. The caveat we publish with it is that September is also the rainiest month of the year, 8 days with 1 mm or more, so take one wet-weather plan with you.

When does it rain in Peñíscola?

Mostly in autumn. September has the most rain days of the year, 8, and July the fewest, 2. A rain day here means 1 mm or more, the World Meteorological Organization threshold. On this coast autumn rain tends to arrive as short heavy episodes rather than all-day drizzle.

Can you swim in Peñíscola in October?

The water is not the problem: the sea averages 23 °C in October, which is warmer than the 22 °C of June, when nobody hesitates. What changes is the air, down to 23 °C from the 27 °C of June, and the evenings. The sea figures come from the two nearest measured buoys rather than from Peñíscola itself, which is the one caveat worth carrying.

How hot does it get in Peñíscola in summer?

The hottest month is August, with a mean daily high of 30 °C and a mean low of 21 °C, over the 30-year series. That is a mean, not a maximum: individual days go well above it. July is barely cooler and much drier.

What is the sea temperature in Peñíscola?

It ranges from about 14 °C in January, February and March to 27 °C in August, and it stays at 22 °C or above for 5 months of the year. Where the figures come from, stated plainly: there is no buoy at Peñíscola, so this is the mean of the two nearest long measured series — the Puertos del Estado buoys off Valencia and Tarragona, about 96 km south and 103 km north, with 19 and 12 years of hourly data, agreeing with each other to within 1.4 °C every month.

Where do these figures come from?

Air temperatures and rain days are the means of the complete daily ERA5 series over 30 full years, 1995 to 2024, 10,958 days, for the grid point nearest the castle, downloaded from the Open-Meteo archive and aggregated by this site. The grid point, the period and the consultation date are published on the Spanish weather page, together with the reason the sea column is treated differently.

Also in English

The rest of what we publish in English:

More detail in Spanish

The Spanish weather page carries the live forecast for the coming days, the full provenance of every column, and month-by-month guides for September and October with what is open and what it costs.

Go to the Spanish page