Dark Sky Odds

Stargazing at Boschplaat: when is the sky clear and dark?

March is the best month for stargazing at Boschplaat: on average 28 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 81% 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

International Dark Sky Park · Netherlands · DarkSky International

MarchBest month
153Clear moonless dark hours a year
81%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
January9%131817%
February17%2014714%
March19%2812822%
April17%207926%
May4%31324%
June0%00—
July0%019%
August7%96514%
September14%2011218%
October10%1615211%
November7%111766%
December8%121886%

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 than81% of Europe’s land
Light pollutionvery dark (darkest 5–20 %)
Sky-glow index (own, VIIRS) — Darkest spot we found0.58
Sky-glow index (own, VIIRS) — at the official map point0.64
Sky-glow index (own, VIIRS) — median across the area0.64
Darkest spot we found53.442, 5.458 (map) — within 4.0 km of the Wikidata point (no OSM boundary)

Next new moons

New moonNightMoonless dark hours that nightTypical share of good nights that month
9 November 20268–9 November 202611.07%
9 December 20268–9 December 202612.28%
7 January 20277–8 January 202712.09%
6 February 20276–7 February 202710.817%
8 March 20277–8 March 20278.819%
6 April 20276–7 April 20276.217%
6 May 20275–6 May 20272.74%
4 June 20274–5 June 20270.00%
4 July 20273–4 July 20270.00%
2 August 20271–2 August 20271.77%
31 August 202731 August 2027 – 1 September 20275.87%
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 202612%55%6.858°
Geminids *13–14 December 202617%20%10.870°
Geminids *14–15 December 202618%28%9.570°
Quadrantids3–4 January 202720%13%12.873°
Lyrids22–23 April 202730%95%1.569°
Eta Aquariids *5–6 May 202725%0%5.37°
Eta Aquariids *6–7 May 202733%1%5.38°
Perseids *12–13 August 202728%84%3.367°
Perseids *13–14 August 202723%90%2.267°
Orionids21–22 October 202717%58%2.853°
Leonids *17–18 November 202712%82%1.358°
Leonids *18–19 November 202710%73%2.858°
Geminids14–15 December 202718%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