King tides in Guam, 2026–27
King tides are the highest tides of the year. The next statewide king tides are Nov 26–28, when 2 of 4 spots have their highest tides of the year. Dates, times and heights below come from NOAA predictions for 4 spots in Guam, worked out for the next 12 months.
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Guam king tide dates
| Dates | Peak day | Spots at their highest that day |
|---|---|---|
| Nov 26–28 | Thu Nov 26 | 2 of 4 spots |
| Dec 23–30 | Thu Dec 24 | 3 of 4 spots |
| Jan 19–27 | Fri Jan 22 | 3 of 4 spots |
| Feb 18–23 | Thu Feb 18 | 1 of 4 spots |
| Jun 5–13 | Sun Jun 6 | 3 of 4 spots |
| Jul 3–11 | Sun Jul 4 | 3 of 4 spots |
| Aug 1–5 | Sun Aug 1 | 2 of 4 spots |
| Aug 31–Sep 2 | Tue Aug 31 | 1 of 4 spots |
Big states can have more than one season: one stretch of coast may peak in fall while another peaks in winter. The table for your spot below is the one to trust.
Biggest king tides in Guam
The spots where the year's highest tide stands furthest above an ordinary high tide:
- Stanwood, Stillaguamish River: 8.1 ft on Jan 25 at 7:39 AM, 1.1 ft above a typical high
- Apra Harbor, Guam: 2.9 ft on Aug 3 at 7:06 AM, 0.6 ft above a typical high
- Pago Bay, Guam: 2.1 ft on Jan 21 at 4:31 PM, 0.4 ft above a typical high
- Tanapag Harbor, Saipan Island: 2.5 ft on Dec 25 at 9:53 AM, 0.3 ft above a typical high
King tide times for your spot
| Spot | Next king tides | Highest tide |
|---|---|---|
| Apra Harbor, Guam | Jun 5–13 then Jul 3–11, Aug 1–5 | 2.7 ft Sun Jun 6, 7:14 AM 0.4 ft above a typical high |
| Pago Bay, Guam | Dec 23–25 then Jan 19–23, Feb 18–20 | 2.1 ft Thu Dec 24, 5:32 PM 0.4 ft above a typical high |
| Stanwood, Stillaguamish River | Nov 26–28 then Dec 24–30, Jan 22–27 | 7.9 ft Fri Nov 27, 8:02 AM 0.8 ft above a typical high |
| Tanapag Harbor, Saipan Island | Nov 26–28 then Dec 23–27, Jan 21–23 | 2.4 ft Thu Nov 26, 10:05 AM 0.3 ft above a typical high |
Photograph the king tides
- Arrive half an hour before the peak time for your spot and stay until it passes.
- Include something people know for scale: a stair, a sign, a piling, a sea wall or a road.
- Take a matching photo from the same spot at an ordinary high tide. The pair shows the difference better than words.
- Note the place, date and time, and share it with your state's project below. Planners use these photos to see where the water will reach as sea level rises.
Stay safe
- Stay off jetties, sea walls and rock shelves near the peak. Waves run higher than usual on a king tide.
- On the Pacific coast, keep off drift logs and watch for sneaker waves; a log can roll on you in a few inches of surf.
- Don't drive or walk through flooded streets. Salt water ruins cars, and the curb and drains are hidden.
- Check the marine forecast. Onshore wind, low air pressure or heavy rain can add a foot or more to the predicted tide.
How these dates are worked out
For every spot we take NOAA's high and low tide predictions for the next 12 months and find each day's highest tide. The days in that spot's top 5% (about 18 days a year) are its king tide days, and days next to each other make one window. A statewide window is a run of days when at least a quarter of the state's spots are in theirs. Heights are in feet above mean lower low water (MLLW), the zero on tide charts. Predictions don't include weather. Not for navigation.