7Timer Weather

How to Use This API

1. Civil Forecast (Temperature, Rain, Clouds)

Standard weather forecast for Guangzhou, China (lon=113, lat=23):

http://www.7timer.info/bin/api.pl?lon=113&lat=23&product=civil&output=json

Returns 7 days of 3-hourly data: temp, precipitation type/amount, cloud cover, humidity, wind speed/direction.

2. Astronomical Forecast (Seeing & Transparency)

For stargazing at Mauna Kea, Hawaii (lon=-155.5, lat=19.8):

http://www.7timer.info/bin/api.pl?lon=-155.5&lat=19.8&product=astro&output=json

Returns cloud cover, transparency (1-8), seeing (1-8), and weather conditions optimized for astronomy.

3. Marine Forecast (Wind & Waves)

For offshore conditions near Tokyo (lon=140, lat=35):

http://www.7timer.info/bin/api.pl?lon=140&lat=35&product=marine&output=json

Returns wind speed/direction, wave height, and wave period for marine navigation.

4. JavaScript — Get Weather

const params = new URLSearchParams({
  lon: -74.006, lat: 40.7128,
  product: 'civil', output: 'json'
});
fetch('http://www.7timer.info/bin/api.pl?' + params)
  .then(res => res.json())
  .then(data => console.log('Forecast:', data.dataseries));

5. Python — Multiple Products

import requests

base = 'http://www.7timer.info/bin/api.pl'
params = {'lon': 113, 'lat': 23, 'output': 'json'}

# Civil forecast
params['product'] = 'civil'
civil = requests.get(base, params=params).json()
print('Temp 3-hourly:', [d['temp2m'] for d in civil['dataseries']])

# Astronomical forecast
params['product'] = 'astro'
astro = requests.get(base, params=params).json()
print('Seeing (1-8):', [d['seeing'] for d in astro['dataseries']])