NWS Jacksonville, FL Astronomical Data

Long Duration Nor'Easter - Updated Briefing

Strong northeast winds will continue through at least Saturday. Widespread moderate flooding is likely during times of high tide along the Atlantic coast and within the St. Johns River basin, and Coastal Flood Warnings are in effect. Gale Warnings remain for the Atlantic Waters. Please monitor this briefing for updates! Read More >

SUNRISE AND SUNSET INFORMATION

Astronomical Data

Sun and Moon

NOAA Solar Calculator - Find Sunrise, Sunset, Solar Noon and Solar Position for any location.
NOTE: The USNO websites aa.usno.navy.mil, ad.usno.navy.mil, aristarchus.usno.navy.mil, maia.usno.navy.mil, rorf.usno.navy.mil, and toshi.usno.navy.mil are undergoing modernization efforts. The expected completion of the work and return of service is estimated as 30 April 2020.
USNO - Sunrise/Sunset & Moonrise/Moonset Calculator for one day, anywhere in the U.S.
USNO - Sunrise/Sunset & Moonrise/Moonset Tables for one year, anywhere in the U.S.
USNO - Phases of the Moon
Perigee and Apogee Calculator

Tides and Currents

Time

Official U.S. Time

The U.S. Naval Observatory (USNO) computes astronomical data. Therefore, the NWS does not record, certify, or authenticate astronomical data. Computed times of sunrise, sunset, moonrise, moonset; and twilight, moon phases and other astronomical data are available from USNO's Astronomical Applications Department (http://www.usno.navy.mil).

The USNO websites aa.usno.navy.mil, ad.usno.navy.mil, aristarchus.usno.navy.mil, maia.usno.navy.mil, rorf.usno.navy.mil, and toshi.usno.navy.mil are undergoing modernization efforts. The expected completion of the work and return of service is estimated as 30 April 2020.
See U.S. Naval Observatory - FAQ - Litigation for information on using these data for legal purposes.