Red Sea liveaboards in December: seasons, routes and wetsuits

Is December a good time for a Red Sea liveaboard?

Yes, if you want a winter wreck-and-reef holiday and prepare for cooler water and windy surface intervals. For a concrete December option, Emperor lists seven-night Reefs & Wrecks departures on 24 and 31 December 2026. Its Brothers–Daedalus–Elphinstone programme, Simply the Best, is advertised March–November instead. Choose by the programme and dated sailing, not the claim that the whole Red Sea is a year-round destination.

Those December dates were listed when reviewed on 25 October 2026; they are not a statement that cabins remain available. This guide covers Egypt’s Red Sea liveaboards. It does not forecast the weather for a particular week.

December water temperature: why the packing advice differs

Emperor’s Egypt pre-departure document gives a broad November–March water range of 19–24°C and recommends 5–7mm wetsuits for that period. That is a winter planning range, not a December-only measurement at every reef. Sadko’s December guide describes water around Hurghada as generally in the mid-20s and suggests 3–5mm as a starting point. The sources cover different locations and periods; do not average them into a precise forecast.

For repeated dives on an Emperor winter safari, use its 5–7mm guidance as the starting point and arrange suitable rental sizes before travel. A warm-water short suit is a poor default for this week. Bring dry layers and a windproof jacket for the boat, and discuss a hood or additional protection if you get cold easily. Fit, dive duration and your own cold tolerance still matter.

Winter does not close every offshore route

Do not turn Simply the Best’s March–November window into a claim that the Brothers are legally closed all winter. Emperor separately labels Safaga, Brothers & Elphinstone all year. That route combines Safaga reefs, Brothers and Elphinstone, and can run Hurghada–Port Ghalib or the reverse. It is not a renamed BDE circuit: Daedalus is absent from its advertised route.

Its page currently lists 26 November–3 December 2026 and 2–9 December 2027 examples. Neither establishes a full December 2026 departure or cabin availability. For a Christmas trip, the verified northern listings above are more useful evidence than an all-year headline.

If sharks are the reason for the trip

For Daedalus hammerheads, Emperor’s Daedalus, Fury & Elphinstone description singles out May–November as a period with a stronger chance of schooling encounters. Treat that as the operator’s seasonal guidance, not a sighting probability or guarantee. Choose a programme that actually includes Daedalus; a December northern wreck safari does not answer the same wildlife goal.

Simply the Best requires 50 logged dives and Advanced Open Water or equivalent. The operator’s Egypt pre-departure document also makes Advanced Open Water certification to 30m and 50 logged dives mandatory for its named marine-park itineraries. A favourable month cannot compensate for missing qualifications or unsuitable current experience.

Weather changes and missed sites: read the actual terms

Emperor says routes can change with weather and government approval; the captain and guides decide which sites are reached. Its pre-departure document says missed sites or dives due to weather or other unforeseeable changes do not receive a refund or compensation. It has a separate future-credit policy for enforced port closures, with different amounts according to days affected. That credit is not a cash refund.

This matters if Thistlegorm is your sole reason to travel. A December departure listing establishes the planned trip, not guaranteed access to that wreck. Read cancellation and disruption cover before paying, rather than assuming a changed itinerary is automatically refundable.

Build the Christmas journey around the last dive

For the listed northern Reefs & Wrecks trips, use Hurghada as the round-trip port. For South & St Johns, use Port Ghalib and compare the actual Marsa Alam transfer arrangements. A southern route is not a reason to book Hurghada flights without pricing the longer connection.

Emperor’s document requires a minimum of 24 hours between the last dive and flight departure, and its programme pages describe a final night in port. Apply all relevant medical, training and insurer restrictions too; this is an operator rule, not personal medical clearance. Sources reviewed 25 October 2026.

Vessel safety is separate from the season

MAIB’s February 2025 bulletin identifies serious construction, stability, fire protection, lifesaving-equipment and escape-route failures on boats involved in Egyptian liveaboard accidents. It recommends reputable vendors able to give assurance about the specific boat’s safety standards and a thorough briefing before departure. A December trip, calmer forecast or familiar operator name is not a vessel safety assessment. We have not inspected or certified the boats discussed here.