Dark Sky Odds

Stargazing at De Alde Feanen National Park: when is the sky clear and dark?

March is the best month for stargazing at De Alde Feanen National Park: on average 29 clear, moonless hours of full darkness, and 19% of nights have at least two of them (ERA5, 2006–2025). The darkest spot we found there is darker than 39% of Europe’s land (NASA VIIRS 2025).

Data updated: 31 December 2025 · Sources and licences

Calculated 5 November 2026 · cloud cover ERA5 2006–2025 · night lights NASA VIIRS 2025

national park · Netherlands

MarchBest month
171Clear moonless dark hours a year
39%darker than … of Europe’s land
19%Nights with ≥ 2 such hours (March)

Month by month

MonthNights with ≥ 2 such hoursClear moonless dark hoursMoonless dark hoursOf them clear
January11%1818210%
February16%2114715%
March19%2912822%
April16%208025%
May4%41528%
June0%00—
July0%037%
August9%106815%
September14%2111218%
October12%1815212%
November11%151769%
December10%141888%

No astronomical darkness (June): the Sun stays above −18° all night.

Climate, not a forecast: these are shares of past nights (ERA5 reanalysis, 2006–2025), not a prediction for a particular night. Check a forecast before you go.

Light pollution

Darker than39% of Europe’s land
Light pollutionnoticeable light glow
Sky-glow index (own, VIIRS) — Darkest spot we found6.09
Sky-glow index (own, VIIRS) — at the official map point7.76
Sky-glow index (own, VIIRS) — median across the area7.76
Darkest spot we found53.108, 5.942 (map) — within the OSM boundary

Next new moons

New moonNightMoonless dark hours that nightTypical share of good nights that month
9 November 20268–9 November 202610.811%
9 December 20268–9 December 202612.010%
7 January 20277–8 January 202712.011%
6 February 20276–7 February 202710.816%
8 March 20277–8 March 20278.819%
6 April 20276–7 April 20276.316%
6 May 20275–6 May 20272.84%
4 June 20274–5 June 20270.00%
4 July 20273–4 July 20270.00%
2 August 20271–2 August 20271.89%
31 August 202731 August 2027 – 1 September 20275.89%
30 September 202729–30 September 20278.314%

Hours with the Sun below −18° and the Moon below the horizon, on the night of the new moon, at the darkest spot.

Meteor showers

ShowerPeak nightChance of a clear peak nightMoon litMoonless dark hours (Sun < −12°)Radiant max. height
Leonids17–18 November 202622%55%6.859°
Geminids *13–14 December 202618%20%10.870°
Geminids *14–15 December 202620%28%9.770°
Quadrantids3–4 January 202727%13%12.774°
Lyrids22–23 April 202733%95%1.369°
Eta Aquariids *5–6 May 202728%0%5.58°
Eta Aquariids *6–7 May 202733%1%5.38°
Perseids *12–13 August 202722%84%3.367°
Perseids *13–14 August 202723%90%2.267°
Orionids21–22 October 202728%58%2.853°
Leonids *17–18 November 202722%82%1.559°
Leonids *18–19 November 202722%73%2.859°
Geminids14–15 December 202720%98%0.070°

* The peak falls in daylight in Europe, so both neighbouring nights are shown.

Clear peak night: at least 2 hours with ≤ 20 % cloud while the Sun is below −12°, on the same calendar night ± 1 in 2006–2025.

How we calculate