Fossil River entrance, AK tide times
NOAA tide prediction station 9468123, 63.4667° N, 170.0170° W. Heights in feet above MLLW.
Today at Fossil River entrance, AK
Today's predicted high and low waters, sunrise and sunset for Fossil River entrance, AK load here from NOAA. Without JavaScript they cannot be shown: NOAA's own table for station 9468123 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 Fossil River entrance, AK
Across the 1419 high and low waters NOAA predicts here for 2027, high water averages 1.41 ft above MLLW and low water 0.29 ft — a mean range of 1.12 ft. Taking each day's higher high and lower low, which is the swing someone standing on the shore actually sees, the average is 1.43 ft.
On 93% of days in 2027 there are two high waters and on the remaining 25 days only one. Where there are two, they differ in height by 0.19 ft on average. Successive high waters are 12h 21m apart on average.
The largest daily swing of 2027 is 2.16 ft on 4 August 2027 and the smallest is 0.58 ft on 26 April 2027 , a factor of 3.7 between the biggest spring tide and the smallest neap.
Measured figures
| Mean high water | 1.41 ft above MLLW |
|---|---|
| Mean low water | 0.29 ft above MLLW |
| Mean range | 1.12 ft |
| Mean great diurnal range | 1.43 ft |
| Largest daily range in 2027 | 2.16 ft on 4 August 2027 |
| Smallest daily range in 2027 | 0.58 ft on 26 April 2027 |
| Highest predicted tide | 2.39 ft at 7:45 AM on 11 July 2027 |
| Lowest predicted tide | -0.36 ft at 9:58 PM on 9 May 2027 |
| Average gap between high waters | 12h 21m |
| Tidal pattern | semidiurnal (1.94 high waters a day) |
| Position | 63.4667° N, 170.0170° W |
| NOAA station id | 9468123 |
Every figure above is computed from NOAA's published predictions for station 9468123 for the whole of 2027 (365 days, 1419 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 Fossil River entrance, AK, 156 of the 710 low waters predicted for 2027 — 22% of them — fall below zero, the lowest being -0.36 ft on 9 May 2027.
Practically: a chart showing 6 ft of water here means about 6 ft at a mean lower low water and about 7.4 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 subordinate station. NOAA does not run a separate harmonic analysis here; it takes the predictions for Nome, AK, 251 km (156 miles) away and shifts them. High water arrives 4 h earlier than the reference station and low water 4 h 8 min earlier than it. Heights are the reference station's multiplied by 1.13 at high water and 0.67 at low water.
Those constants are NOAA's own, published for station 9468123 (reference 9468756). They are why a subordinate station's table is never simply its neighbour's.
Daylight at this latitude
Fossil River entrance, AK sits at 63.4667° N. The longest day of 2027 here is 20h 37m of daylight on 21 June 2027; the shortest is 4h 29m on 21 December 2027 — a difference of 16h 08m.
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
- Savoonga, AK 35 km (22 miles)
- Northeast Cape, AK 55 km (34 miles)
- Niyrakpak Lagoon entrance, AK 70 km (43 miles)
- Point Spencer, Port Clarence, AK 251 km (156 miles)
- Nome, AK 251 km (156 miles)
- Tin City, AK 252 km (157 miles)
Put these tides on your own site
One line of HTML shows today's tides for Fossil River entrance, AK on any page:
<script src="https://tidedata.romermade.com/v1/embed.js" data-station="9468123" defer></script>No account, no key, no build step. How it works.