✦ WJM PhotographyAstro Weather · V3.1.8
Plan your night under the stars

Astro Weather

Free astronomy forecasts, wherever you observe. Your preferences are saved in this browser. Instructions & Help ↗

📍 Observing locationNot configured

Observing location

Enter your observing location.

Test WU API ↗

Station ID and location preferences are saved in this browser. You can choose to remember your API key on this device below; this is less secure on shared devices. Alternatively the site owner can configure a private server-side key. The key is sent only to the PHP relay for station requests.

Explore nearby stations ↗ · based on observing location

No station selected.

🔭 Open Observing Monitor ↗Refresh explained ↗

🔭 Current observing conditions Awaiting readings

📍 Location—
🌌 Estimated Bortle—
🌡️ Temperature—
☁️ Cloud—
💨 Wind—
💧 Humidity / dew point—
🌧️ Station rainNo live reading
🌙 Moon—
✨ Observing outlook—
⚠️ Conditions alertsWaiting for current data.
🔔 Sound repeats every 60 seconds until dismissed (while page is active).

Observing outlook Awaiting forecast

Choose a location to calculate observing conditions.

GoodMarginalPoor

Dew heater warning —

—Temperature / dew point spread

Moon position —

—Altitude, direction and illumination

🔭 Current observing assessment Awaiting data

Waiting for forecast and station readings.

Monitoring interval: waiting

No live station observation yet.

My Local Weather Station

Select a station to attempt live observations.
Live data requires a configured server-side API connection.

Current forecast —

—High / mid / low cloud
💨 Wind forecast —
🌧️ Rain forecast —

Reserved panel

Space for a future observing feature.

48-hour observing forecast

The temperature and humidity below are current forecast readings; the hourly chart shows the next 48 hours.

🌡️ Current temperature (forecast)

—Humidity —

Best night-time hour

—Awaiting forecast

Sky Forecast — Next 48 Hours

Each block is one hour. Green = clear, amber = mixed, red = cloudy. Daylight hours are muted; hover or tap for exact cloud cover. Hourly details remain below.

Hourly details

Cloud cover, observing score, wind and humidity. Scroll sideways for all 48 hours; dates use weekday and DD/MM format. How to read the cards and calculate the score ↗

Select a location above.

Sun and Moon

Select a location above.
Moon illumination is approximate. A bright Moon mainly affects faint deep-sky targets; it can be excellent for lunar imaging.
Moon phaseLunar imagery: NASA Scientific Visualization Studio / Lunar Reconnaissance Orbiter

Suggested targets tonight

Select a location and save your equipment profile to see seasonal target ideas.

Seasonal suggestions only; check actual visibility, altitude and obstructions before imaging.

Other things to look out for

☄️ Meteor showers: check current activity.

🌌 Aurora: check NOAA's live forecast for possible activity; visibility is not guaranteed.

🔭 Comets: check NASA/JPL Horizons for positions; no comet is currently verified for recommendation here.

Sources: American Meteor Society · NOAA SWPC · NASA/JPL. Check local darkness and cloud before observing.

Sky darkness / Bortle

Not rated

Select an observing location to load your estimated sky darkness.

The Bortle scale runs from 1 (darkest) to 9 (brightest). Automatic values are modelled overhead estimates, not measurements at your telescope. Manual selections are saved only in this browser.

Explore the full light-pollution map ↗

Automatic estimates by DarkSkySites.com. Modelled sky brightness, not a live measurement.

Tonight's assessment

Select a location above.

Forecast score is a rough guide based on cloud, wind and humidity; not a seeing forecast. Calendar events are snapshots, not live updates.

My equipment profile

Saved on this device only. No login or registration required in V1.