tidealmanac
Thu, Dec 17

Friday, December 18, 2026

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

Sat, Dec 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. High10:30 AM0.7 ft0.22 m
  2. Low10:11 PM0.1 ft0.04 m

Range 0.6 ft0.18 m · 2 predicted tides · MLLW

Sun

Civil dawn
6:25 AM
Sunrise
6:49 AM
Solar noon
12:21 PM
Sunset
5:52 PM
Civil dusk
6:16 PM
Daylight
11h 3m

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

Moon

First quarter69% illuminated · day 9 of the cycle

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

This week

Tue, Dec 15L 2:38AM 0.1 ft0.03 mH 1:48PM 0.8 ft0.24 mWed, Dec 16L 2:26AM 0.2 ft0.06 mH 1:27PM 0.7 ft0.22 mThu, Dec 17L 12:39AM 0.3 ft0.08 mH 12:09PM 0.7 ft0.21 mL 10:42PM 0.2 ft0.07 mFri, Dec 18H 10:30AM 0.7 ft0.22 mL 10:11PM 0.1 ft0.04 mSat, Dec 19H 9:52AM 0.8 ft0.24 mL 10:10PM 0.0 ft-0.01 mSun, Dec 20H 9:50AM 0.9 ft0.27 mL 10:27PM -0.2 ft-0.05 mMon, Dec 21H 10:10AM 0.9 ft0.29 mL 10:58PM -0.3 ft-0.08 m