The Land That Time Forgot (2009) on Netflix

Plot summary

In the present day, two newly married couples set out on a charter boat cruise across the Caribbean. A strange storm hits, and the vessel comes out near Caprona, an island inside the Bermuda Triangle that sits in a time void. The island is home to dinosaurs and other anachronistic creatures, along with the crew of a German U-boat that is stranded there. Frost Michaels, his wife Karen, the other couple, and the charter captain find themselves caught between the prehistoric creatures and the Germans. Frost wants to get off Caprona and back to his own time, but the island's dangers and the U-boat crew block the way.