tidealmanac
Thu, Sep 17

Friday, September 18, 2026

Arroyo, PR · NOAA TEC4737 · MLLW · Local time (America/Puerto_Rico)

Sat, Sep 19

This is a subordinate station: NOAA predicts its highs and lows from a nearby reference station and publishes no curve for it. Nothing is interpolated.

Tides

  1. Low4:32 AM0.1 ft0.02 m
  2. High6:27 PM0.9 ft0.26 m

Range 0.8 ft0.24 m · 2 predicted tides · MLLW

Sun

Civil dawn
5:51 AM
Sunrise
6:13 AM
Solar noon
12:19 PM
Sunset
6:25 PM
Civil dusk
6:46 PM
Daylight
12h 12m

Computed from the station's coordinates (NOAA solar algorithm, ±1 min); not NOAA tide data. Sun calendars: sunupsundown.site.

Moon

First quarter44% illuminated · day 6 of the cycle

Near quarter moon: neap tides, a smaller range than average. Approximate phase, computed here.

This week

Tue, Sep 15L 2:44AM 0.2 ft0.07 mH 3:56PM 0.8 ft0.26 mWed, Sep 16L 3:10AM 0.1 ft0.04 mH 4:45PM 0.8 ft0.26 mThu, Sep 17L 3:47AM 0.1 ft0.03 mH 5:35PM 0.9 ft0.26 mFri, Sep 18L 4:32AM 0.1 ft0.02 mH 6:27PM 0.9 ft0.26 mSat, Sep 19L 5:26AM 0.1 ft0.03 mH 7:14PM 0.9 ft0.27 mSun, Sep 20L 6:30AM 0.1 ft0.04 mH 7:52PM 0.9 ft0.28 mMon, Sep 21L 7:43AM 0.2 ft0.06 mH 8:17PM 0.9 ft0.29 m