Apra Harbor, Guam tide times
Next–
Then–
Tide chart · today
The next 7 days
Apra Harbor, Guam at a glance
- Tides
- Twice a day, unequal
- Typical range
- 2.3 fthigh to low
- Highest of 2027
- 2.9 ftTue, Aug 3
- Lowest of 2027
- -1.1 ftFri, Jan 22
- Record high
- 4.3 ftAug 28, 1992
- High water after the moon
- 7 h 38 min
The tide at Apra Harbor, Guam
- Pattern
- Mixed, mainly twice-daily
Two highs and two lows on most days, but unequal ones. On average the higher high stands 0.2 ft above the lower high, and the lower low sits 1.2 ft below the higher low. Form number 1.01. - Typical range
- 2.3 ft from the higher high to the lower low on an average day (0.71 m) - a smaller range than 57% of the 235 places on this site. The mean range, high to low, is 1.6 ft.
- After the moon
- High water comes about 7 h 38 min after the moon is highest in the sky.
2027: the biggest and smallest tides
| Tue, Aug 3 | 7:06 am | 2.9 ft | |
| Mon, Jul 5 | 7:06 am | 2.9 ft | |
| Wed, Sep 1 | 7:13 am | 2.8 ft |
| Fri, Jan 22 | 1:09 am | -1.1 ft | in the dark |
| Wed, Dec 15 | 2:21 am | -1.1 ft | in the dark |
| Wed, Nov 17 | 3:16 am | -0.8 ft | in the dark |
| Sun, Jun 6 | 2:46 pm | -0.6 ft | |
| Sun, Jul 4 | 1:45 pm | -0.6 ft | |
| Mon, Aug 2 | 1:32 pm | -0.5 ft |
178 low tides in 2027 drop below zero - below the average lower low water - and uncover more shore than usual.
Records
- Highest water recorded
- 4.3 ft (1.31 m) on Aug 28, 1992 - 1.9 ft above the average higher high.
- Lowest water recorded
- -2.3 ft (-0.71 m) on Oct 24, 1972.
- Highest tide the moon and sun can raise
- 2.9 ft (0.88 m) - the highest astronomical tide in NOAA’s 19-year cycle, which fell on Jul 22, 2009.
Tide times nearby
- Pago Bay, Guam10 mi east
See the moon move the ocean - the same tide, on a globe seen from the moon.
Heights are above mean lower low water (MLLW), the zero of US charts; times are local. The year’s tides are NOAA’s official predictions - wind and air pressure can move the real water a foot or more. Form number: (K1+O1)/(M2+S2) from NOAA’s harmonic constants - below 0.25 twice-daily, above 3 once-daily. Guam, 13.443°N 144.656°E. Predictions and records: NOAA CO-OPS, station 1630000. Not for navigation or safety. For a boat, a crossing of sand that floods, or a swim, use the official tables and local advice. No ads, no tracking.