The 2025 dive season — sixty-one field reports across four sites in twelve months.

The year in field reports.

The 2025 calendar year produced sixty-one published field reports across the four documented sites. Distribution by site: Heracleion-Thonis seventeen reports, Pharos lighthouse blocks twelve reports, Canopus eight reports, eastern harbour survey twenty-four reports. The eastern harbour survey continues to be the journal's most productive site by report-count because the harbour conditions allow productive dive work in more weeks of the year than the open-coast sites. The Heracleion-Thonis site remains the most-read individual file by subscriber-engagement metrics.

The spring 2025 season — March through May.

The spring season ran from 12 March through 18 May, with thirty-one dive days at sea across the nine weeks. Visibility at the Pharos block field was unusually good in early April (eight to nine metres consistently for ten days), which allowed the most detailed condition-tracking work in three seasons; eight previously-unphotographed Pharos blocks were added to the photographic archive during this window. The Heracleion-Thonis spring season concentrated on the Grid A temple area in alongside-dives with the Goddio team; six alongside-dives were filed across the temple precinct. The eastern harbour survey ran weekly through the spring, with a particular focus on the Cape Lochias submerged section where Iman Hosny was completing the structural inventory of the palace-foundation field.

The autumn 2025 season — September through November.

The autumn season ran from 8 September through 22 November, with twenty-nine dive days at sea. Visibility was poorer than the spring (three to six metres at most sites), which is typical of the autumn season but produced fewer photographic plates of publication quality than the spring. The autumn work concentrated on Canopus (six dives across the Sarapieion temple complex), on the Heracleion-Thonis Grid B southern harbour (five alongside-dives with the Goddio team during their autumn season), and on the eastern harbour Antirrhodos island (ten dives). The autumn season ended early — on 22 November rather than the planned 30 November — because of a storm system in the last week of November that the boat's skipper called as outside the operational safety envelope.

The year's corrections.

Six corrections were issued in 2025, all minor and all resolved within the standard thirty-day correction window. Three corrected weight or measurement readings on individual blocks (one Pharos block, two Heracleion temple stones); two corrected the dating window on specific Canopus statuary that the journal had described from a 2018 institutional publication that was subsequently superseded by a 2023 update we had missed; one corrected an institutional-attribution mistake in an alongside-dive report (the journal had attributed a finding to the Goddio team that was in fact made by the Egyptian Antiquities Authority's own submerged-archaeology unit). All six corrections are in the public corrections log and were published in the bulletin in the month following the confirmation.

The climate-change observations.

The journal records standardised climate-change observations at each site each season. The 2025 measurements show the Alexandria coast sea level at approximately 0.2 cm above the journal's 2016 baseline, consistent with the broader Mediterranean record (approximately 3.6 mm per year average for the eastern Mediterranean over the past decade). The journal's site-specific measurements show the Antirrhodos kerb now at six point two metres depth (compared to six point zero metres in 2016), the Heracleion temple foundation deposits at six point six metres (six point four in 2016), and the Canopus Sarapieion precinct at five point six metres (five point five in 2016). The depth changes are small in absolute terms but consistent with the modelled sea-level rise trajectory.

The institutional context — 2025 events.

The Centre d'Études Alexandrines published three significant scholarly papers in 2025 covering the eastern harbour survey work; the journal's 2025 bulletins included commentary essays on each. The Goddio Foundation announced a five-year programme extension running through 2030 for the Heracleion-Thonis work, which means the journal's alongside-dive access at the site is secured through that window. The Egyptian Ministry of Antiquities revised its submerged-archaeology permitting framework in October 2025; the journal's dive-charter permit was renewed under the revised framework without complication, but the framework's increased reporting requirements have added approximately fifteen percent to our administrative overhead.

The 2026 outlook.

The 2026 spring season starts on 9 March and the journal expects to maintain the typical thirty-dive-day spring intensity. The autumn 2026 season is planned for 7 September through 28 November pending weather. The journal's alongside-dive arrangements with the Goddio team and the Centre d'Études Alexandrines are confirmed for both seasons. The major new programme in 2026 is the joint conservation-protocols revision with the Centre d'Études team; the revised protocols are expected to publish in September 2026 and represent the journal's most significant collaborative work since the 2019 Wadi El-Hitan conservation programme partnership at Heracleion.

The journal's full ten-year archive of field reports and season summaries is available to Field-station and Institutional subscribers. The four site files (Heracleion, Pharos, Canopus, eastern harbour) contain the season-by-season detail. The conservation protocols document covers the running site-stewardship questions.