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Tides

Explore / Station 1619000

Johnston Atoll, United States of America tide times

16.7383°N · 169.5300°W

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Datums

Datumft
STND0
MHHW4.03
MHW3.78
DTL2.92
MTL2.86
MSL2.86
MLW1.93
MLLW1.81
GT2.21
MN1.85
DHQ0.24
DLQ0.12
HWI3.5
LWI9.64

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Tide times for Johnston Atoll, United States of America

Today, Saturday, August 22, in Johnston Atoll, United States of America, high tide is at 1:39 AM (1.2 ft) and 2:02 PM (1.9 ft), and low tide is at 7:11 AM (0.7 ft) and 9:12 PM (0.5 ft) (HAST). Sunrise is at 7:04 AM and sunset is at 7:40 PM HAST. Heights are in feet above MLLW, the chart datum.

The moon is a first quarter today, 68% illuminated.

7-day tide table (HAST)

High and low tide times for Johnston Atoll, United States of America for the next seven days, with sunrise and sunset. Times are local (HAST); heights in feet above MLLW.
DayHigh tidesLow tidesSunriseSunset
Today, Sat, Aug 22
1:39 AM (1.2 ft)
2:02 PM (1.9 ft)
7:11 AM (0.7 ft)
9:12 PM (0.5 ft)
7:04 AM7:40 PM
Sun, Aug 23
2:58 AM (1.3 ft)
3:03 PM (2.0 ft)
8:30 AM (0.6 ft)
9:51 PM (0.3 ft)
7:04 AM7:39 PM
Mon, Aug 24
3:45 AM (1.5 ft)
3:47 PM (2.2 ft)
9:22 AM (0.5 ft)
10:24 PM (0.2 ft)
7:04 AM7:38 PM
Tue, Aug 25
4:22 AM (1.7 ft)
4:24 PM (2.4 ft)
10:04 AM (0.3 ft)
10:53 PM (0.0 ft)
7:05 AM7:38 PM
Wed, Aug 26
4:55 AM (1.9 ft)
4:57 PM (2.5 ft)
10:41 AM (0.2 ft)
11:21 PM (-0.1 ft)
7:05 AM7:37 PM
Thu, Aug 27
5:26 AM (2.1 ft)
5:28 PM (2.6 ft)
11:16 AM (0.1 ft)
11:48 PM (-0.2 ft)
7:05 AM7:36 PM
Fri, Aug 28
5:57 AM (2.3 ft)
5:59 PM (2.6 ft)
11:51 AM (0.1 ft)
7:05 AM7:36 PM

NOAA harmonic predictions for station 1619000, datum MLLW, station local time. Updated daily. Predictions are for planning, not navigation.

Johnston Atoll, United States of America tide questions

What time is high tide in Johnston Atoll, United States of America today?
High tide in Johnston Atoll, United States of America today (Saturday, August 22) is at 1:39 AM (1.2 ft) and 2:02 PM (1.9 ft), local station time (HAST). Heights are measured in feet above MLLW.
What time is low tide in Johnston Atoll, United States of America today?
Low tide in Johnston Atoll, United States of America today (Saturday, August 22) is at 7:11 AM (0.7 ft) and 9:12 PM (0.5 ft), local station time (HAST).
How big are the tides in Johnston Atoll, United States of America this week?
Over the next seven days the water at Johnston Atoll, United States of America spans 2.7 ft — from a low of -0.2 ft at 11:48 PM on Thu, Aug 27 to a high of 2.6 ft at 5:28 PM on Thu, Aug 27.
When is the next minus tide at Johnston Atoll, United States of America?
The next minus tide at Johnston Atoll, United States of America is -0.1 ft at 11:21 PM on Wed, Aug 26. Minus tides drop below the MLLW zero line and expose the most shoreline — the best windows for tidepooling, clamming, and beachcombing.
How accurate are tide predictions for Johnston Atoll, United States of America?
Predictions come from NOAA harmonic analysis of long-term water level records at this station, which is why tide tables can be published years in advance. Astronomical timing is very reliable, but actual water level can run higher or lower with sustained wind, barometric pressure, and river flow — Perigee overlays live observed water levels on the chart above so you can see today's difference.

About station 1619000

Johnston Atoll, United States of America is NOAA tide station 1619000, at 16.7383°N, 169.5300°W, in service since 1947. Perigee charts its tide predictions and six-minute water level observations live from NOAA CO-OPS, alongside wind, temperature, and the sun and moon over this spot. The mean tidal range here is 1.9 ft (great diurnal range 2.2 ft). Tides here are mixed — the two daily highs (and the two lows) differ noticeably in height. Everything on this page is also available from the free Perigee API and MCP server.

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