Sources and credits
Sources for the editorially reviewed text. Occasion: on 23 September 2026, weather services reported that warm Indian summer weather would follow a cool Thursday, including Weeronline via ANP (https://persportaal.anp.nl/artikel/7d621d88-9f9a-44e9-a18b-d00998a17100/warm-nazomerweer-op-komst-tijdens-laatste-dagen-september) and NU.nl (https://www.nu.nl/weerbericht/6410677/na-donderdag-breekt-nazomer-echt-aan-temperatuur-stijgt-naar-ruim-20-graden.html).
Sources
- KNMI – KNMI - The North Sea as a heat battery for autumn showers (accessed 2026-09-24)
- KNMI – KNMI - The North Sea is warming, but not everywhere and not equally fast in every season (accessed 2026-09-24)
- ANP Press Portal – Warm Indian summer weather on the way in the last days of September (accessed 2026-09-24)
- KNMI – KNMI - Weather - Forecasts (accessed 2026-09-24)
- Copernicus / ECMWF – Climate Bulletins | Copernicus (accessed 2026-09-24)
- KNMI – KNMI - Record-warm and dry summer (accessed 2026-09-24)
- Wikipedia – Nazomer (Indian summer) - Wikipedia (accessed 2026-09-24)
- KNMI – KNMI - Summery weather map (accessed 2026-09-24)
- Weer.nl – What is an oudewijvenzomer? - Weer.nl (accessed 2026-09-24)
Images
The beach at Scheveningen on a sunny, hazy morning in May 2019, with the harbour piers and the red-and-white harbour light on the right. A few walkers stroll along the waterline.
Paul van de Velde from Netherlands · CC BY 2.0 · Original source
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A female garden cross spider in her web with dewdrops, on an autumn morning in September 2010 in England.
Wjh31 · CC BY 3.0 · Original source
The North Sea from space on 7 September 2018, captured by the European satellite Sentinel-3A. The pale blue streaks in the southern part are an algal bloom; the Netherlands and Germany lie at the bottom right.
European Space Agency · CC BY-SA 3.0 igo · Original source
Validity
- Valid until 30 September 2026: the piece relies on the weather forecasts for the last week of September 2026; after that they are out of date.
Article 52a33e1db6a402536f03087b52bddb091795645a2019c8df391828a4da17acc9
Claims fa7c91e657f9ec9599c729381fd232c574fd8360c20be83a1fe115ba1d1fee8a
Image 60fbe798beb22c555cec5f318a25af20074078e58a034502b78d4f907e61c55a
Edition 2026-09-24