When to plant peas in San Sebastián: 1 January – 20 September

In San Sebastián, peas: sow straight into the bed from 1 January to 20 September.

Peas in San Sebastián: soil, season and weather

Peas tolerates light frost and could go in three weeks before the last frost (22 January), but the top 7 cm of soil reaches its minimum of 4 °C only around 7 January, 6 days after that.

Last spring frost	22 January
Top 7 cm of soil at 4 °C	already in the first week of January
First autumn frost	3 December, 336 days after the start
Days in the bed to the first harvest (card)	74
First harvest, if planted in this window	16 March – 3 December
Days left for picking	262
Daylight	9:02 on 1 January
Watering outdoors when fruiting (card)	every 3 days; the driest month, July, has 13 rainy days

Peas in San Sebastián: care after planting

Planted on 1 January: in the first weeks water every 6 days.

Pests and diseases of peas to watch for:

Weather in San Sebastián during the peas season

About 1726 mm of rain falls in the season; July is the driest month (73 mm) and November the wettest (230 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
January	11.1	5	205	16	9:19
February	13.2	5.9	150	14	10:31
March	14.2	6.8	156	17	11:52
April	15.9	8.3	122	15	13:23
May	18.2	10.7	127	17	14:40
June	21.3	14.2	109	14	15:23
July	22.7	16	73	13	15:06
August	23.6	16.3	99	12	14:00
September	22.1	14.3	127	13	12:33
October	19.7	12.4	139	13	11:05
November	14.7	8.6	230	18	9:44
December	12.8	6.9	189	15	9:00

ERA5 2016–2025, Open-Meteo

Peas in nearby cities

All the nearest cities on our list plant peas later than San Sebastián; the closest date is in Bayonne, 4 days later.

City	Distance	Date	Difference
Bayonne	45 km	5 January – 4 October	4 days later
Pamplona	63 km	28 February – 17 September	58 days later
Vitoria-Gasteiz	77 km	16 March – 11 September	74 days later
Bilbao	77 km	21 February – 13 October	51 days later
Logroño	102 km	19 February – 21 September	49 days later
Pau	131 km	19 February – 21 September	49 days later

Where to buy peas seeds in San Sebastián

Seeds go straight into the bed from 1 January to 20 September; buy them before that. Within 15 km of San Sebastián OpenStreetMap lists 4 garden centres, 3 farm-supply shops, 6 markets and 4 farm shops (collected 27 October 2026).

Azoka — market
4 km
Txapartegi — market
1 km
Groseko Azoka — market
1 km
Gotzon — market
1 km

Each window starts on the Greenly calendar date and ends on the last day that still leaves the crop’s days to harvest (from its card) before the average first autumn frost, plus six weeks of picking for crops harvested over weeks (tomatoes, peppers, aubergines, cucumbers, courgettes, pumpkins, watermelons, beans) — our rule; earlier in the window is safer.

Questions