Teresa and Samuel Arrive Back-to-Back to Shatter Storm Record

Storm “Therese” – the 19th Named System of the Season – to Bring Heavy Rain and Waves to the Canary Islands from Wednesday

The state meteorological agency (AEMET) confirmed on Monday that the low‑pressure system “Therese”, the 19th named storm of the 2025‑26 season, will affect the Canary Islands from Wednesday with locally heavy rain, thunderstorms, strong winds and a maritime storm.

“The Canary Islands will be the most affected part of Spain, with locally heavy rain, thunderstorms, strong winds and a maritime storm from Wednesday 18. With Therese, there are already 19 named systems this season,” AEMET wrote on its X profile.

This sets an absolute record since the naming of storms began in the 2017‑18 season. The previous high was 17 storms in 2023‑24.

Storm “Samuel” – Expected to Bring Thunderstorms, Hail and Heavy Rain to the Canary Islands

The forecast for the mainland and the Balearic Islands remains generally stable this week, with normal to slightly above‑average temperatures in northern Spain, according to AEMET spokesperson Rubén del Campo. He did, however, acknowledge the approach of another Atlantic low that will affect the Canaries from Tuesday onward.

Key points from the forecast:

• Tuesday: Light clouds over the Canary archipelago with weak precipitation; very strong northeast winds over the peninsula and the Balearics, generating waves of 6‑7 m in the islands and the Cantabrian Sea.
• Wednesday: Temperatures rise, especially in northern and central mainland Spain (up to 10 °C higher than Sunday).
• Thursday: A low‑pressure system, originally a DANA, will move toward the Canaries, turning into a storm. Expect locally heavy showers, thunderstorms, hail in mountainous areas, and possible snowfall on the highest peaks. Temperatures will drop across the archipelago.

“The instability will be greater in the Canary Islands, while the peninsula will enjoy calmer weather, albeit with some cloudiness in the Mediterranean area,” del Campo explained.

Strong Rainfall Expected to Persist Beyond Thursday in the Canary Islands

The storm will continue to affect the Canaries on Thursday, bringing locally heavy showers with thunder and hail. Accumulations could be significant in the mountainous zones. Meanwhile, the mainland will return to stable conditions, though the Mediterranean may see increased cloud cover and isolated thunderstorms in the far southwest.

Temperatures:

• Cooler in the Canaries and the peninsula.
• Slightly higher in western mainland Spain.

The pattern of instability in the Canaries and calmer weather on the peninsula and Balearics is likely to continue through the end of the week, with occasional rain possible in southern mainland Spain.

Possible Arrival of “Therese” – The 19th Storm of the Season

Weather portal Eltiempo.es predicts that “Therese” could reach the Iberian Peninsula over the weekend, depending on its trajectory. If it does, the southwest of the country—especially Extremadura, Huelva, Cádiz and Seville—would experience the heaviest rainfall, with weaker impacts elsewhere.

The service notes that weekend weather remains uncertain and will depend on the storm’s evolution. Temperatures are expected to fall gradually across the country from Wednesday, though daytime highs will stay elevated in many regions. Frost will be limited to mountainous areas, aided by wind and increased cloud cover.

Anticipated Weekly Totals of 100‑150 L/m² in the Canary Islands

Meteored climatologist Samuel Biener warned that the Canaries will be the first autonomous community to feel the storm’s effects. A series of fronts and instability lines will bring widespread precipitation from tomorrow, with local intensities ranging from strong to very strong.

• Weekly accumulations could exceed 100‑150 L/m² on La Palma, Tenerife and Gran Canaria, especially on southwestern slopes, northern faces and mountain summits.
• Snow may return to Teide and the highest peaks of La Palma.
• Exposed areas could experience winds over 90‑100 km/h.

Residents are advised to stay informed of official warnings and to take precautionary measures where necessary.