Churches are being called to be “harbours of hope” for the 1.9 million seafarers around the world, who keep global trade moving in often challenging conditions. 

Sea Sunday, marked on 12 July, comes at a time when the dangers posed to seafarers have been brought sharply into focus by the Iran war. Vessels have come under fatal fire in the Strait of Hormuz, a key shipping channel. On Saturday night, strikes by Tehran on a Cypriot-flagged ship left one crew member unaccounted for with the container in flames, according to US Central Command. 

Mission to Seafarers is urging a day of prayer, reflection and action, for those whose work is often unseen. The charity warns that as many spend months at sea, seafarers navigate separation from family, isolation, exhaustion and uncertainty. This is often at a time of limited communication and access to support. 

The Sea Sunday 2026 theme centres on Matthew 25:31-46. In the passage, Jesus identifies himself with the vulnerable and tells his followers when they care for “the least of these” they serve him. 

“The campaign encourages churches to see themselves as modern-day harbours, places of refuge, dignity and connection for those facing life’s storms”, the mission says. It highlights small compassionate acts that can make a difference, such as a chaplain being able to visit seafarers, providing a listening ear and a free SIM card to make video calls. It is inviting prayers for seafarers, their families and those who support them; support for chaplaincy visits, emergency aid and communication for isolated crews.

Founded 170 years ago, Mission to Seafarers chaplains and volunteers work in more than 200 ports worldwide, providing practical, emotional and spiritual care.