Okayama or Fukuyama · Altitude not shown until sourced

Bisei Astronomical Observatory

The public observatory in Bisei, with night access governed by its official calendar.

Bright stars may show. Check access first.

Forecast availableSky conditions onlyRecommendation paused

Sunset 19:17Astronomical dark 20:57Sunrise 05:07

77Sky conditions only

Fair↗

Moon for the selected night

First quarter

41% · Above horizon

41%

Good

Cloud

22%

Wind 0.5 km/h

Excellent

Rain chance

Visibility 18 km

Poor

Humidity

90% · 26°C

Visibility 18 km

Hourly sky conditions

Mon, Jul 20

Outside opening window

Checks before departure

Verify the open night, hours, and any storm or snow closure on the official calendar.

Outside opening windowOfficial warning not verified

Time basis: Asia/Tokyo
Forecast and viewing coordinates: 34.67203, 133.54539
Altitude: Altitude not shown until sourced

Before you stargaze

· Give your eyes about 10 minutes to adapt to the dark after arrival.
· Keep flashlights and vehicle lights low for other stargazers.
· Recheck local wind, cloud, temperature, and official warnings just before departure.
· Verify roads, public transport, the walking route, and your return separately from the sky score.

Sources and checked dates

Geospatial Information Authority of Japan map

Checked: Jul 10, 2026, 00:00 · Review by: Jan 6, 2027, 00:00

Bisei Astronomical Observatory 2026 opening calendar

Checked: Jul 10, 2026, 00:00 · Review by: Jul 24, 2026, 00:00

Japan Meteorological Agency warnings and advisories

Checked: Jul 10, 2026, 00:00 · Review by: Jul 11, 2026, 00:00

Back to Japan conditions

Okayama or Fukuyama · Altitude not shown until sourced

Bisei Astronomical Observatory

The public observatory in Bisei, with night access governed by its official calendar.

Bright stars may show. Check access first.

Forecast availableSky conditions onlyRecommendation paused

Sunset 19:17Astronomical dark 20:57Sunrise 05:07

77Sky conditions only

Fair↗

Moon for the selected night

First quarter

41% · Above horizon

41%

Good

Cloud

22%

Wind 0.5 km/h

Excellent

Rain chance

Visibility 18 km

Poor

Humidity

90% · 26°C

Visibility 18 km

Hourly sky conditions

Mon, Jul 20

Outside opening window

Checks before departure

Verify the open night, hours, and any storm or snow closure on the official calendar.

Outside opening windowOfficial warning not verified

Time basis: Asia/Tokyo
Forecast and viewing coordinates: 34.67203, 133.54539
Altitude: Altitude not shown until sourced

Before you stargaze

· Give your eyes about 10 minutes to adapt to the dark after arrival.
· Keep flashlights and vehicle lights low for other stargazers.
· Recheck local wind, cloud, temperature, and official warnings just before departure.
· Verify roads, public transport, the walking route, and your return separately from the sky score.

Sources and checked dates

Geospatial Information Authority of Japan map

Checked: Jul 10, 2026, 00:00 · Review by: Jan 6, 2027, 00:00

Bisei Astronomical Observatory 2026 opening calendar

Checked: Jul 10, 2026, 00:00 · Review by: Jul 24, 2026, 00:00

Japan Meteorological Agency warnings and advisories

Checked: Jul 10, 2026, 00:00 · Review by: Jul 11, 2026, 00:00