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Culebra, Puerto Rico

Culebra keeps Atlantic Standard Time at UTC−4 year-round. Although it is an island east of Puerto Rico’s main island, it shares Puerto Rico’s single time zone and does not observe daylight saving time.

Culebra, Puerto Rico

Friday, 4 September 2026

UTC−4 · America/Puerto_Rico

Time and sun data for Culebra — the largest city of Culebra

The sun in Culebra

Sunrise 06:09 Solar noon 12:22 Sunset 18:35 Daylight 12 h 26 min Night 11 h 34 min Civil twilight 05:47 – 18:57

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Current time in Culebra, Puerto Rico

Culebra uses the America/Puerto_Rico time-zone identifier. Its local abbreviation is AST. The clock does not move forward in spring or backward later in the year, so a recurring local activity can remain at the same stated hour.

The island’s position farther east does not establish another official zone. Longitude can influence solar events, but civil time is set by the territorial time-zone rule. Consequently, a watch set correctly in San Juan is already set correctly for Culebra.

Civil time: Atlantic Standard Time UTC relationship: UTC−4 Seasonal adjustment: none Database name: America/Puerto_Rico Difference from Puerto Rico’s main island: zero hours Culebra may greet the eastern sky from an island shore, but its clock still keeps Puerto Rico company.

Culebra and the territory-wide clock

San Juan, Bayamón, Carolina, Ponce, and Caguas are among Puerto Rico’s major cities. All have exactly the same official time as Culebra. Ferry or flight timetables between the island and other Puerto Rican destinations therefore use one time zone at both ends.

This avoids a common travel mistake: treating an offshore island as though it must have a separate hour. In Culebra’s case, the only time to add is actual journey and check-in time. No time-zone correction belongs in the calculation.

People joining from outside Puerto Rico should still verify their conversion for the event date. Their own region may change to or from daylight saving time. Culebra remains at UTC−4 while the time difference changes from the other side.

Sunrise beside Culebra’s horizon

Sunrise listings for Culebra vary by date and should use the island’s coordinates rather than a generic Puerto Rico location. Even within one time zone, east-west position can produce a small difference in solar timing.

Open coastal views may offer a clear horizon, but the visible result still depends on viewpoint, cloud, and nearby landforms. Astronomical sunrise is a calculated event. Civil dawn begins earlier and may provide enough light for some activities before the Sun itself appears.

Specify Culebra, Puerto Rico, in the lookup. Select the exact travel or activity date. Confirm that local output is AST or UTC−4. Check marine weather and visibility separately if going on the water. A sunrise table cannot replace operational safety information. It answers when the Sun reaches the horizon under the calculation; it does not describe sea conditions, cloud cover, or whether a particular beach faces the event unobstructed.

Questions and answers
Is Culebra one hour ahead of San Juan?
No. Culebra and San Juan share the same local time.
Does Culebra change clocks seasonally?
No. It remains on AST, UTC−4, throughout the year.
Should I use Culebra’s own location for sunrise?
Yes. Sunrise is location-sensitive, so a Culebra-specific calculation is the better reference.

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