Prudhoe Bay, AK tide times
NOAA tide prediction station 9497645, 70.4114° N, 148.5317° W. Heights in feet above MLLW.
Today at Prudhoe Bay, AK
Today's predicted high and low waters, sunrise and sunset for Prudhoe Bay, AK load here from NOAA. Without JavaScript they cannot be shown: NOAA's own table for station 9497645 is at tidesandcurrents.noaa.gov. Everything else on this page is measured and does not change from day to day.
What the tide does at Prudhoe Bay, AK
Across the 1393 high and low waters NOAA predicts here for 2027, high water averages 0.58 ft above MLLW and low water 0.12 ft — a mean range of 0.46 ft. Taking each day's higher high and lower low, which is the swing someone standing on the shore actually sees, the average is 0.63 ft.
On 91% of days in 2027 there are two high waters and on the remaining 33 days only one. Where there are two, they differ in height by 0.22 ft on average. Successive high waters are 12h 35m apart on average.
The largest daily swing of 2027 is 1.03 ft on 1 October 2027 and the smallest is 0.12 ft on 8 September 2027 , a factor of 8.6 between the biggest spring tide and the smallest neap.
Measured figures
| Mean high water | 0.58 ft above MLLW |
|---|---|
| Mean low water | 0.12 ft above MLLW |
| Mean range | 0.46 ft |
| Mean great diurnal range | 0.63 ft |
| Largest daily range in 2027 | 1.03 ft on 1 October 2027 |
| Smallest daily range in 2027 | 0.12 ft on 8 September 2027 |
| Highest predicted tide | 1.35 ft at 4:14 AM on 6 August 2027 |
| Lowest predicted tide | -0.49 ft at 9:14 AM on 10 April 2027 |
| Average gap between high waters | 12h 35m |
| Tidal pattern | mixed, mainly semidiurnal (1.91 high waters a day) |
| Position | 70.4114° N, 148.5317° W |
| NOAA station id | 9497645 |
Every figure above is computed from NOAA's published predictions for station 9497645 for the whole of 2027 (365 days, 1393 tides), not from a regional average or an estimate.
What MLLW means here
Every height on this page is feet above MLLW — mean lower low water, the chart datum NOAA publishes tide predictions against. It is the average of the lower of each day's low waters, taken over a 19-year period, so zero here is neither the sea bed nor the average sea level: it is a level the water drops below regularly. At Prudhoe Bay, AK, 295 of the 697 low waters predicted for 2027 — 42% of them — fall below zero, the lowest being -0.49 ft on 10 April 2027.
Practically: a chart showing 6 ft of water here means about 6 ft at a mean lower low water and about 6.6 ft at a mean higher high. Add the predicted height for the moment you care about to the charted depth.
Where these predictions come from
This is a reference station: NOAA computes its predictions directly, from a harmonic analysis of water levels measured at this location, rather than by offsetting another station's table.
Daylight at this latitude
Prudhoe Bay, AK sits at 70.4114° N. On 75 days of 2027 the sun does not set here at all, and on 57 it does not rise.
Day lengths are computed with NOAA's published solar algorithm from the station's latitude and longitude. Clock times for sunrise and sunset are deliberately not printed here: they depend on the station's UTC offset, and this site takes that offset from NOAA's own answers rather than from a timezone table — so it is the live panel above, which has them, that shows the times.
Nearest other stations
- Point Thomson, Beaufort Sea, AK 90 km (56 miles)
- Cape Halkett, AK 146 km (91 miles)
- Barter Island, AK 187 km (116 miles)
- Drew Point, Smith Bay, AK 206 km (128 miles)
- Point Barrow, AK 303 km (189 miles)
- Barrow Offshore, AK 316 km (197 miles)
Put these tides on your own site
One line of HTML shows today's tides for Prudhoe Bay, AK on any page:
<script src="https://tidedata.romermade.com/v1/embed.js" data-station="9497645" defer></script>No account, no key, no build step. How it works.