Apra Harbor Tide Times
Current Tide State
Rising tide
↑ Next: 7:47
High in 0h
Current Tide Status
Next Tide
High Tide
Time
7:47
Height
0.7m
in 20m
Tide Station Details
Station ID:
gu-apra-harbor
Region:
Pacific/Guam
Country:
Guam
Continent:
Oceania
Latitude:
13.444300°
Longitude:
144.655000°
Time & Data Information
Timezone:
Pacific/Guam
Abbreviation:
Guam
Local Time:
7:27
Last Updated:
2026-03-01T21:27:34.152Z
Data Source:
Live APIHeight Unit:
Meters (m)
Apra Harbor - 7 Day Tide Forecast (Guam)
Complete tidal predictions with Spring/Neap cycle analysis
Tidal Range
0.8m
Neap Tide
Apra Harbor Tidal Analysis
- Times shown in Guam
- Neap tides occur when sun and moon are at right angles, creating smaller ranges
- Heights are relative to Chart Datum
- Weather conditions may affect actual tide levels
📊Apra Harbor Tide Chart Key
The tide chart above shows the height and times of high tide and low tide for Apra Harbor. The red flashing dot shows the tide time right now. The grey shading corresponds to nighttime hours between sunset and sunrise at Apra Harbor.
Tide Times are Guam.
Fri 23 Jan (height: 5.59m / 18.3ft)
Wed 04 Feb (height: 5.91m / 19.4ft)
Apra Harbor Extreme Tides - Next 7 Days (Guam)
Highest and lowest tide predictions for the week ahead
Highest Tides
8:40
4 March 2026
0.7m
High Tide8:15
3 March 2026
0.7m
High Tide9:02
5 March 2026
0.7m
High Tide19:24
3 March 2026
0.7m
High Tide18:32
2 March 2026
0.7m
High TideLowest Tides
0:47
2 March 2026
-0.2m
Low Tide1:32
3 March 2026
-0.1m
Low Tide2:11
4 March 2026
-0.1m
Low Tide2:47
5 March 2026
0.0m
Low Tide17:06
8 March 2026
0.1m
Low TideHighest Tide
0.7m
Lowest Tide
-0.2m
Tidal Range
0.8m
Period
7 Days
What time is high tide in Apra Harbor?
The next high tide in Apra Harbor is at 7:47 with a height of 0.68m. High tides occur approximately every 12 hours and 25 minutes due to the lunar cycle. Plan your beach visits, boating activities, and other marine pursuits around these peak water levels.
What time is low tide in Apra Harbor?
The next low tide in Apra Harbor is at 0:47 with a height of -0.15m. Low tides alternate with high tides throughout the day, providing optimal times for beach activities and marine exploration. Use this chart to plan fishing trips, beach visits, boating activities, and other marine pursuits.
Apra Harbor Tide Chart
The tide chart above shows a 7-day forecast of tide heights for Apra Harbor. The chart displays both high and low tides with precise times and heights in meters. You can use this chart to plan fishing trips, beach visits, boating activities, and other marine pursuits. The data is updated regularly from official tide monitoring stations to ensure accuracy for your location in Guam.
Tide Times for Apra Harbor: Monday 2 March 2 March 2026
Tide Times for Apra Harbor: Tuesday 3 March 3 March 2026
Tide Times for Apra Harbor: Wednesday 4 March 4 March 2026
Tide Times for Apra Harbor: Thursday 5 March 5 March 2026
Tide Times for Apra Harbor: Friday 6 March 6 March 2026
Tide Times for Apra Harbor: Saturday 7 March 7 March 2026
Tide Times for Apra Harbor: Sunday 8 March 8 March 2026
Apra Harbor Detailed Tide Times
| Date & Time | Height | Type |
|---|---|---|
2 March 2026 0:47 | -0.2m | Low |
2 March 2026 7:47 | 0.7m | High |
2 March 2026 13:20 | 0.3m | Low |
2 March 2026 18:32 | 0.7m | High |
3 March 2026 1:32 | -0.1m | Low |
3 March 2026 8:15 | 0.7m | High |
3 March 2026 14:02 | 0.3m | Low |
3 March 2026 19:24 | 0.7m | High |
4 March 2026 2:11 | -0.1m | Low |
4 March 2026 8:40 | 0.7m | High |
Apra Harbor
Pacific/Guam
Latitude
13.444300°
Longitude
144.655000°
Map Type
Street Map
Zoom Level
14x
Station Information
Latitude
13.4443°
Longitude
144.6550°
Timezone
Pacific/Guam
Station ID
gu-apra-harbor
About Apra Harbor Tide Times
Apra Harbor is located in the Oceania region in Guam. The tide predictions shown above cover 7 days of high and low tide times, updated daily using professional-grade harmonic tidal analysis. Tide heights are displayed in metres above Chart Datum (CD), the standard reference level used in marine navigation charts.
Tidal patterns at Apra Harbor are driven by the gravitational forces of the Moon and Sun acting on the local ocean. The timing and height of each tide depends on the shape of the local coastline, water depth, and the position of celestial bodies relative to Earth. Like all coastal locations, Apra Harbor experiences a full tidal cycle approximately every 24 hours and 50 minutes.
Spring tides — which occur at new moon and full moon — produce the largest tidal ranges at Apra Harbor, with higher high tides and lower low tides than average. Neap tides, at the quarter moons, produce the smallest ranges. This fortnightly cycle is an important consideration for anyone planning coastal activities in the area.
Who Uses Tide Predictions for Apra Harbor?
🎣 Fishermen & Anglers
Fish are most active around tide changes, particularly the two hours either side of high and low water. Anglers targeting shore fish near Apra Harbor use tide predictions to plan sessions when water movement is at its most productive.
⛵ Sailors & Boaters
Navigating in and out of harbours and estuaries near Apra Harbor safely requires knowing the state of the tide. Sailors rely on these predictions to avoid running aground in shallow water and to time passage through tidal channels.
🏄 Surfers & Water Sports
Many surf breaks and water sports venues near Apra Harbor are tide-dependent. Certain breaks work only on a specific tide height, while kayaking and paddleboarding routes can be heavily affected by tidal currents and water depth.
🏖️ Beachgoers & Walkers
Tidal beaches, coastal paths, and rock pools near Apra Harbor are accessible only at certain tide states. Checking tide times before visiting ensures you don't get cut off by a rising tide, and helps you find the best time to explore exposed sand and rocky shores.
How to Read the Apra Harbor Tide Chart
The tide chart above plots predicted water height (in metres) against time for Apra Harbor. The curved line rises to peaks (high tide) and falls to troughs (low tide). The height shown is measured above Chart Datum — a reference level set near the lowest predicted astronomical tide level for the area.
- HWHigh Water — the peak of the tide. This is when the sea is at its highest level. The exact time and height changes each day.
- LWLow Water — the trough of the tide. The sea is at its lowest level, often exposing rocks, sand, and mudflats.
- ↑Flood tide — the period when the tide is rising from low water to high water. Currents flow onshore or up estuaries during this phase.
- ↓Ebb tide — the period when the tide is falling from high water to low water. Currents flow offshore or down estuaries during this phase.
All times shown are in the local timezone for Apra Harbor (Pacific/Guam). Remember that tide times advance by roughly 50 minutes each day, so always check the chart for your specific visit date.
Frequently Asked Questions — Apra Harbor Tides
How many tides does Apra Harbor have per day?
Most coastal locations, including Apra Harbor, experience two high tides and two low tides every 24 hours and 50 minutes — this is called a semidiurnal tidal pattern. Some regions experience one tide per day (diurnal), or a mixed pattern. The exact cycle for Apra Harbor is shown in the chart above.
How accurate are tide predictions for Apra Harbor?
Astronomical tide predictions for Apra Harbor are typically accurate to within 15–30 minutes and a few centimetres. However, actual water levels can vary due to weather — strong onshore winds raise sea levels, while offshore winds lower them. Storm surges and low atmospheric pressure can add significant height. Always treat predictions as a guide and check local conditions before heading to the coast.
What is Chart Datum and why is it used?
Chart Datum (CD) is the reference level from which all tide heights at Apra Harbor are measured. It is set close to the Lowest Astronomical Tide (LAT) — meaning tide heights are almost always positive numbers. Chart Datum is also the reference used on nautical charts for water depth, so mariners can add the predicted tide height to the charted depth to calculate the actual depth of water at any given time.
Why do tide times change every day?
Tides are caused by the Moon's orbit around the Earth, which takes approximately 24 hours and 50 minutes to complete one tidal cycle. This means high and low tides at Apra Harbor occur about 50 minutes later each day. Over a month, this adds up to a complete shift through the clock. The height of tides also changes through the monthly cycle between spring and neap tides.
Want to learn more about how tides work? Read our complete guide to tide times →