NOAA Tides

How to Use This API

1. Real-Time Water Levels

Station 9414290 is in San Diego, CA:

https://api.tidesandcurrents.noaa.gov/api/prod/datagetter?station=9414290&product=water_level&datum=MLLW&units=english&time_zone=gmt&format=json

2. Tide Predictions

https://api.tidesandcurrents.noaa.gov/api/prod/datagetter?station=9414290&product=predictions&datum=MLLW&units=english&time_zone=gmt&format=json&interval=hilo

3. Station Info

https://api.tidesandcurrents.noaa.gov/api/prod/datagetter?station=9414290&product=datums&format=json

4. JavaScript — Check Tide

fetch('https://api.tidesandcurrents.noaa.gov/api/prod/datagetter?station=9414290&product=predictions&datum=MLLW&units=english&time_zone=gmt&format=json')
  .then(r => r.json())
  .then(d => {
    d.predictions.forEach(p => {
      console.log(p.t, '—', p.v, 'ft');
    });
  });

5. Python — Water Level Graph Data

import requests
from datetime import datetime, timedelta

today = datetime.now().strftime('%Y%m%d')
params = {
    'station': '9414290',
    'product': 'water_level',
    'datum': 'MLLW',
    'units': 'english',
    'time_zone': 'gmt',
    'format': 'json',
    'date': today
}
resp = requests.get('https://api.tidesandcurrents.noaa.gov/api/prod/datagetter', params=params)
data = resp.json()
for reading in data['data'][:10]:
    print(f"{reading['t']}: {reading['v']} ft")